667813704 has 16 divisors (see below), whose sum is σ = 1669534320. Its totient is φ = 222604560.

The previous prime is 667813697. The next prime is 667813733. The reversal of 667813704 is 407318766.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13912762 + ... + 13912809.

It is an arithmetic number, because the mean of its divisors is an integer number (104345895).

Almost surely, 2^667813704 is an apocalyptic number.

It is an amenable number.

667813704 is an abundant number, since it is smaller than the sum of its proper divisors (1001720616).

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

667813704 is a wasteful number, since it uses less digits than its factorization.

667813704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27825580 (or 27825576 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 667813704 is about 25842.0917110051. The cubic root of 667813704 is about 874.0811923727.

The spelling of 667813704 in words is "six hundred sixty-seven million, eight hundred thirteen thousand, seven hundred four".