60 (sixty) ( Listen (help·info)) is the natural number following 59 and preceding 61. Being three times twenty, 60 is called "three score" in some older literature.

← 59 61 → 60
← 60 61 62 63 64 65 66 67 68 69 → List of numbers — Integers 0 10 20 30 40 50 60 70 80 90 →
Cardinal	sixty
Ordinal	60th (sixtieth)
Numeral system	sexagesimal
Factorization
Divisors	1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
Roman numeral	LX
Binary	1111002
Octal	748
Duodecimal	5012
Hexadecimal	3C16

Look up sixty in Wiktionary, the free dictionary.

[edit] In mathematics

Sixty is a composite number with divisors 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 making it also a highly composite number. Because 60 is the sum of its unitary divisors (excluding itself), it is a unitary perfect number. Being ten times a perfect number, 60 is a semiperfect number.

60 is the smallest number divisible by the numbers 1 to 6. (There is no smaller number divisible by the numbers 1 to 5). 60 is the smallest number with exactly 12 divisors.

This number is the sum of a pair of twin primes (29 + 31), as well as the sum of four consecutive primes (11 + 13 + 17 + 19). It is adjacent to two prime numbers (59,61).

The smallest non-abelian simple group has order 60.

In geometry, 60 is the number of seconds in a minute, and the number of minutes in a degree. In normal space, the 3 interior angles of an equilateral triangle each measure 60 degrees, adding up to 180 degrees.

A number system with base-sixty is called the sexagesimal (original meaning of sexagesimal is sixtieth).

[edit] In science

Buckminsterfullerene C₆₀ has 60 carbon atoms in each molecule

The first fullerene to be discovered was buckminsterfullerene C₆₀ - an allotrope of carbon with 60 atoms in each molecule. This ball is known as a Buckland ball, and looks like a soccer ball.

[edit] Cultural number systems

The Babylonian number system had a base of sixty. The number system in the Mali Empire was also based on sixty (this is reflected in the counting system of the Maasina Fulfulde, a variant of the Fula language spoken in contemporary Mali).^[1] The sexagenary cycle plays a role in Chinese calendar and numerology.　Because 60 is divisible by the sum of its digits in base 10, it is a Harshad number. In German: das Schock and in Latin: sexagena equals 60 = 5 dozen = 1/2 small gross. This quantity was used in international medieval treaties e.g. for ransom of captured Teutonic Knights.

[edit] In religion

• Judaism
  • In the laws of kashrut, the proportion (60:1) of kosher to non-kosher ingredients which can render an admixture kosher post-facto. (Talmud, Tractate Chullin 98b ; Shulchan Aruch, Yoreh Deah 98)
  • In the Bedtime Shema, the number of strong men (giborim) said to surround King Solomon's bed.

[edit] In other fields

There are 60 seconds in a minute, and 60 minutes in an hour

Sixty is:

• In time, the number of seconds in a minute, and the number of minutes in an hour.^[2]
• The number of feet in the standard measurement tool to evaluate an automotive launch on a dragstrip. It's the time that it took to travel the first 60 feet (18 m) of the track.
• The number of miles per hour an automobile accelerates to from a complete stop (0-60) as one of the standard measurements of performance
• 60 Minutes, a CBS investigative television show
• Sixty Minute Man was a TV show starring Kenny Baumann
• The number of the European route E60 from Brest, France, to Constanţa, Romania
• Municipal Okrug 60, name of Posadsky Municipal Okrug of Petrogradsky District of St. Petersburg, Russia until April 2009
• A common speed limit, in miles per hour, for freeways in many U.S. states
• A common speed limit, in kilometers per hour, in urban areas in Russia
• In years of marriage, the diamond wedding anniversary
• The maximum number of marbles (game pieces) in Chinese checkers
• The code for international direct dial calls to Malaysia
• The highest obtainable level on World of Warcraft (not including World of Warcraft: The Burning Crusade)
• Studio 60 on the Sunset Strip was a TV show on NBC (2006-07)
• Gone in Sixty Seconds is a movie starring Nicolas Cage
• Miss Sixty is a women's apparel brand
• The total number of cards in the game Racko
• The number of the French department Oise
• Alpha 60 is a brain-computer in the movie Alphaville directed by Jean-Luc Godard
• The age for senior citizen in some cultures

[edit] In sports

• In darts, 60 (treble-twenty) is the highest score which can be achieved with a single dart.
• New York Yankees Babe Ruth hit 60 home runs in 1927
• Atlanta Falcons Tommy Nobis uniform #60
• Philadelphia Eagles Chuck Bednarik uniform #60
• NBA: Gilbert Arenas set a Washington Wizards franchise record scoring 60 points on Dec. 17, 2006 (leading the Wizards to a 147-141 win over the Los Angeles Lakers).

[edit] Historical years

60 A.D., 60 B.C., 1960, 2060, etc.

[edit] References

1. ^ La Fontane, Jean sybil (2004). The Interpretation of Ritual: Essays in Honour of A.I. Richards. Routledge. pp. 320. 
2. ^ Dennis Guedj, Numbers: The Universal Language, transl. Lory Frankel. New York: Harry N. Abrams, Inc. Publishers (1997): 71. "60: the ace of divisibility. The more divisible a number is ... the more useful it proves in certain situations. ... Is it because 60 is highly divisible that the hour has been divided into 60 minutes, and the minute into 60 seconds? Look at the list of its twelve divisors ... Compare this with the larger number 100, which has only nine divisors."