665655052623204 has 48 divisors (see below), whose sum is σ = 1775085518907008. Its totient is φ = 190186581616128.

The previous prime is 665655052623191. The next prime is 665655052623247. The reversal of 665655052623204 is 402326250556566.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16275804 + ... + 39952620.

Almost surely, 2^{665655052623204} is an apocalyptic number.

It is an amenable number.

665655052623204 is an abundant number, since it is smaller than the sum of its proper divisors (1109430466283804).

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

665655052623204 is a wasteful number, since it uses less digits than its factorization.

665655052623204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24011524 (or 24011522 counting only the distinct ones).

The product of its (nonzero) digits is 77760000, while the sum is 57.

The spelling of 665655052623204 in words is "six hundred sixty-five trillion, six hundred fifty-five billion, fifty-two million, six hundred twenty-three thousand, two hundred four".