667579904 has 20 divisors (see below), whose sum is σ = 1333856964. Its totient is φ = 333789696.

The previous prime is 667579903. The next prime is 667579907. The reversal of 667579904 is 409975766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667579901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651422 + ... + 652445.

Almost surely, 2^667579904 is an apocalyptic number.

667579904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

667579904 is a deficient number, since it is larger than the sum of its proper divisors (666277060).

667579904 is an equidigital number, since it uses as much as digits as its factorization.

667579904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303885 (or 1303869 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 53.

The square root of 667579904 is about 25837.5676873811. The cubic root of 667579904 is about 873.9791758798.

The spelling of 667579904 in words is "six hundred sixty-seven million, five hundred seventy-nine thousand, nine hundred four".