Sixty
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:
This number is the sum of a pair of twin primes (29 + 31), as well as the sum of four consecutive
primess (11 + 13 + 17 + 19).
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.
See also: fifty,
seventy,
integer,
list of numbers.