655660 has 12 divisors (see below), whose sum is σ = 1376928. Its totient is φ = 262256.

The previous prime is 655657. The next prime is 655687. The reversal of 655660 is 66556.

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, 16372 + ... + 16411.

It is an arithmetic number, because the mean of its divisors is an integer number (114744).

2⁶⁵⁵⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

655660 is an abundant number, since it is smaller than the sum of its proper divisors (721268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

655660 is a wasteful number, since it uses less digits than its factorization.

655660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32792 (or 32790 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 655660 is about 809.7283495099. The cubic root of 655660 is about 86.8746157014.

The spelling of 655660 in words is "six hundred fifty-five thousand, six hundred sixty".