668051256832 has 20 divisors (see below), whose sum is σ = 1334797727076. Its totient is φ = 334025628160.

The previous prime is 668051256811. The next prime is 668051256853. The reversal of 668051256832 is 238652150866.

It is an interprime number because it is at equal distance from previous prime (668051256811) and next prime (668051256853).

It is a self number, because there is not a number n which added to its sum of digits gives 668051256832.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652393294 + ... + 652394317.

Almost surely, 2^668051256832 is an apocalyptic number.

It is an amenable number.

668051256832 is a deficient number, since it is larger than the sum of its proper divisors (666746470244).

668051256832 is an equidigital number, since it uses as much as digits as its factorization.

668051256832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304787629 (or 1304787613 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 52.

The spelling of 668051256832 in words is "six hundred sixty-eight billion, fifty-one million, two hundred fifty-six thousand, eight hundred thirty-two".