664710365168 has 40 divisors (see below), whose sum is σ = 1292674430208. Its totient is φ = 331119214272.

The previous prime is 664710365161. The next prime is 664710365177. The reversal of 664710365168 is 861563017466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664710365161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4693571 + ... + 4833117.

Almost surely, 2^664710365168 is an apocalyptic number.

It is an amenable number.

664710365168 is a deficient number, since it is larger than the sum of its proper divisors (627964065040).

664710365168 is a wasteful number, since it uses less digits than its factorization.

664710365168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140661 (or 140655 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 664710365168 in words is "six hundred sixty-four billion, seven hundred ten million, three hundred sixty-five thousand, one hundred sixty-eight".