664664316 has 12 divisors (see below), whose sum is σ = 1550883432. Its totient is φ = 221554768.

The previous prime is 664664303. The next prime is 664664333. The reversal of 664664316 is 613466466.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 27694335 + ... + 27694358.

It is an arithmetic number, because the mean of its divisors is an integer number (129240286).

Almost surely, 2^664664316 is an apocalyptic number.

It is an amenable number.

664664316 is an abundant number, since it is smaller than the sum of its proper divisors (886219116).

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

664664316 is a wasteful number, since it uses less digits than its factorization.

664664316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55388700 (or 55388698 counting only the distinct ones).

The product of its digits is 373248, while the sum is 42.

The square root of 664664316 is about 25781.0844612867. The cubic root of 664664316 is about 872.7049804241.

The spelling of 664664316 in words is "six hundred sixty-four million, six hundred sixty-four thousand, three hundred sixteen".