656070656672 has 12 divisors (see below), whose sum is σ = 1291639105386. Its totient is φ = 328035328320.

The previous prime is 656070656641. The next prime is 656070656711. The reversal of 656070656672 is 276656070656.

It can be written as a sum of positive squares in only one way, i.e., 620559515536 + 35511141136 = 787756^2 + 188444^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251103979 + ... + 10251104042.

Almost surely, 2^656070656672 is an apocalyptic number.

It is an amenable number.

656070656672 is a deficient number, since it is larger than the sum of its proper divisors (635568448714).

656070656672 is a wasteful number, since it uses less digits than its factorization.

656070656672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20502208031 (or 20502208023 counting only the distinct ones).

The product of its (nonzero) digits is 19051200, while the sum is 56.

The spelling of 656070656672 in words is "six hundred fifty-six billion, seventy million, six hundred fifty-six thousand, six hundred seventy-two".