656505996 has 24 divisors (see below), whose sum is σ = 1532408640. Its totient is φ = 218755152.

The previous prime is 656505989. The next prime is 656506001. The reversal of 656505996 is 699505656.

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, 30715 + ... + 47501.

It is an arithmetic number, because the mean of its divisors is an integer number (63850360).

Almost surely, 2^656505996 is an apocalyptic number.

It is an amenable number.

656505996 is an abundant number, since it is smaller than the sum of its proper divisors (875902644).

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

656505996 is a wasteful number, since it uses less digits than its factorization.

656505996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20053 (or 20051 counting only the distinct ones).

The product of its (nonzero) digits is 2187000, while the sum is 51.

The square root of 656505996 is about 25622.3729580224. The cubic root of 656505996 is about 869.1196432197.

The spelling of 656505996 in words is "six hundred fifty-six million, five hundred five thousand, nine hundred ninety-six".