668880444280 has 32 divisors (see below), whose sum is σ = 1509446849040. Its totient is φ = 266758248960.

The previous prime is 668880444263. The next prime is 668880444283. The reversal of 668880444280 is 82444088866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668880444283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24796626 + ... + 24823585.

Almost surely, 2^668880444280 is an apocalyptic number.

It is an amenable number.

668880444280 is an abundant number, since it is smaller than the sum of its proper divisors (840566404760).

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

668880444280 is a wasteful number, since it uses less digits than its factorization.

668880444280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49620559 (or 49620555 counting only the distinct ones).

The product of its (nonzero) digits is 18874368, while the sum is 58.

The spelling of 668880444280 in words is "six hundred sixty-eight billion, eight hundred eighty million, four hundred forty-four thousand, two hundred eighty".