Sixty (60, LX) is a natural number following fifty-nine and preceding sixty-one. It is a composite number with the divisors being 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, making it also a highly composite number. Its prime factorization is:
In normal space, the interior angles of an equilateral triangle each measures 60 degrees, adding up to 180 degrees.
The Babylonian number system had a base of sixty. A number system with base sixty is called a sexagesimal number system.
Sixty is also:
- in the measurement of time, the number of seconds in a minute, and the number of minutes in an hour.
- in geometry, the number of seconds in a minute, and the number of minutes in a degree.
- a common speed limit, in miles per hour, for freeways in many US states.
- in years of marriage, the diamond wedding anniversary.
- the code for international direct dial calls to Malaysia.
- for the year AD 60, see 60.
- the atomic number of neodymium, a lanthanide.
