668287936928 has 24 divisors (see below), whose sum is σ = 1384938817920. Its totient is φ = 316557443520.

The previous prime is 668287936903. The next prime is 668287936969. The reversal of 668287936928 is 829639782866.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549578288 + ... + 549579503.

It is an arithmetic number, because the mean of its divisors is an integer number (57705784080).

Almost surely, 2^668287936928 is an apocalyptic number.

It is an amenable number.

668287936928 is an abundant number, since it is smaller than the sum of its proper divisors (716650880992).

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

668287936928 is a wasteful number, since it uses less digits than its factorization.

668287936928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099157820 (or 1099157812 counting only the distinct ones).

The product of its digits is 752467968, while the sum is 74.

The spelling of 668287936928 in words is "six hundred sixty-eight billion, two hundred eighty-seven million, nine hundred thirty-six thousand, nine hundred twenty-eight".