656663651312 has 20 divisors (see below), whose sum is σ = 1283958174840. Its totient is φ = 325319606208.

The previous prime is 656663651197. The next prime is 656663651323. The reversal of 656663651312 is 213156366656.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188261918 + ... + 188265405.

It is an arithmetic number, because the mean of its divisors is an integer number (64197908742).

Almost surely, 2^656663651312 is an apocalyptic number.

It is an amenable number.

656663651312 is a deficient number, since it is larger than the sum of its proper divisors (627294523528).

656663651312 is a wasteful number, since it uses less digits than its factorization.

656663651312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376527440 (or 376527434 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 50.

The spelling of 656663651312 in words is "six hundred fifty-six billion, six hundred sixty-three million, six hundred fifty-one thousand, three hundred twelve".