660956 has 12 divisors (see below), whose sum is σ = 1162392. Its totient is φ = 328848.

The previous prime is 660949. The next prime is 660973. The reversal of 660956 is 659066.

660956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×660956³ = 866241333801008448, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271 + ... + 1713.

It is an arithmetic number, because the mean of its divisors is an integer number (96866).

2⁶⁶⁰⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

660956 is a deficient number, since it is larger than the sum of its proper divisors (501436).

660956 is a wasteful number, since it uses less digits than its factorization.

660956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 660956 is about 812.9920048807. The cubic root of 660956 is about 87.1078944988.

The spelling of 660956 in words is "six hundred sixty thousand, nine hundred fifty-six".