668032657328 has 40 divisors (see below), whose sum is σ = 1305894750720. Its totient is φ = 331033167360.

The previous prime is 668032657307. The next prime is 668032657337. The reversal of 668032657328 is 823756230866.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1737428 + ... + 2086796.

It is an arithmetic number, because the mean of its divisors is an integer number (32647368768).

Almost surely, 2^668032657328 is an apocalyptic number.

It is an amenable number.

668032657328 is a deficient number, since it is larger than the sum of its proper divisors (637862093392).

668032657328 is a wasteful number, since it uses less digits than its factorization.

668032657328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350445 (or 350439 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 56.

The spelling of 668032657328 in words is "six hundred sixty-eight billion, thirty-two million, six hundred fifty-seven thousand, three hundred twenty-eight".