660973656 has 32 divisors (see below), whose sum is σ = 1888496640. Its totient is φ = 188849568.

The previous prime is 660973627. The next prime is 660973667. The reversal of 660973656 is 656379066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1967016 + ... + 1967351.

It is an arithmetic number, because the mean of its divisors is an integer number (59015520).

Almost surely, 2^660973656 is an apocalyptic number.

It is an amenable number.

660973656 is an abundant number, since it is smaller than the sum of its proper divisors (1227522984).

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

660973656 is a wasteful number, since it uses less digits than its factorization.

660973656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3934383 (or 3934379 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 48.

The square root of 660973656 is about 25709.4079278384. The cubic root of 660973656 is about 871.0867012448.

The spelling of 660973656 in words is "six hundred sixty million, nine hundred seventy-three thousand, six hundred fifty-six".