668320750 has 16 divisors (see below), whose sum is σ = 1251096912. Its totient is φ = 267328200.

The previous prime is 668320739. The next prime is 668320781. The reversal of 668320750 is 57023866.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336392 + ... + 1336891.

It is an arithmetic number, because the mean of its divisors is an integer number (78193557).

Almost surely, 2^668320750 is an apocalyptic number.

668320750 is a deficient number, since it is larger than the sum of its proper divisors (582776162).

668320750 is a wasteful number, since it uses less digits than its factorization.

668320750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673300 (or 2673290 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 668320750 is about 25851.9003169980. The cubic root of 668320750 is about 874.3023554749.

The spelling of 668320750 in words is "six hundred sixty-eight million, three hundred twenty thousand, seven hundred fifty".