668524704 has 48 divisors (see below), whose sum is σ = 1815397920. Its totient is φ = 215156480.

The previous prime is 668524699. The next prime is 668524723. The reversal of 668524704 is 407425866.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117282 + ... + 122849.

It is an arithmetic number, because the mean of its divisors is an integer number (37820790).

Almost surely, 2^668524704 is an apocalyptic number.

It is an amenable number.

668524704 is an abundant number, since it is smaller than the sum of its proper divisors (1146873216).

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

668524704 is a wasteful number, since it uses less digits than its factorization.

668524704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240173 (or 240165 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 668524704 is about 25855.8446777513. The cubic root of 668524704 is about 874.3912844941.

The spelling of 668524704 in words is "six hundred sixty-eight million, five hundred twenty-four thousand, seven hundred four".