667664304 has 20 divisors (see below), whose sum is σ = 1724799576. Its totient is φ = 222554752.

The previous prime is 667664287. The next prime is 667664317. The reversal of 667664304 is 403466766.

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 3 ways as a sum of consecutive naturals, for example, 6954789 + ... + 6954884.

Almost surely, 2^667664304 is an apocalyptic number.

It is an amenable number.

667664304 is an abundant number, since it is smaller than the sum of its proper divisors (1057135272).

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

667664304 is a wasteful number, since it uses less digits than its factorization.

667664304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13909684 (or 13909678 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 42.

The square root of 667664304 is about 25839.2009164370. The cubic root of 667664304 is about 874.0160057951.

The spelling of 667664304 in words is "six hundred sixty-seven million, six hundred sixty-four thousand, three hundred four".