667523684 has 12 divisors (see below), whose sum is σ = 1177365504. Its totient is φ = 331133544.

The previous prime is 667523663. The next prime is 667523743. The reversal of 667523684 is 486325766.

667523684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 656504 + ... + 657519.

It is an arithmetic number, because the mean of its divisors is an integer number (98113792).

Almost surely, 2^667523684 is an apocalyptic number.

It is an amenable number.

667523684 is a deficient number, since it is larger than the sum of its proper divisors (509841820).

667523684 is a wasteful number, since it uses less digits than its factorization.

667523684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314154 (or 1314152 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 47.

The square root of 667523684 is about 25836.4797137691. The cubic root of 667523684 is about 873.9546412444.

The spelling of 667523684 in words is "six hundred sixty-seven million, five hundred twenty-three thousand, six hundred eighty-four".