668500304 has 10 divisors (see below), whose sum is σ = 1295219370. Its totient is φ = 334250144.

The previous prime is 668500297. The next prime is 668500307. The reversal of 668500304 is 403005866.

It can be written as a sum of positive squares in only one way, i.e., 666672400 + 1827904 = 25820^2 + 1352^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668500307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20890619 + ... + 20890650.

It is an arithmetic number, because the mean of its divisors is an integer number (129521937).

Almost surely, 2^668500304 is an apocalyptic number.

It is an amenable number.

668500304 is a deficient number, since it is larger than the sum of its proper divisors (626719066).

668500304 is a wasteful number, since it uses less digits than its factorization.

668500304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41781277 (or 41781271 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 668500304 is about 25855.3728265519. The cubic root of 668500304 is about 874.3806464395.

The spelling of 668500304 in words is "six hundred sixty-eight million, five hundred thousand, three hundred four".