320056664 has 8 divisors (see below), whose sum is σ = 600106260. Its totient is φ = 160028328.

The previous prime is 320056657. The next prime is 320056687. The reversal of 320056664 is 466650023.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 320056664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20003534 + ... + 20003549.

Almost surely, 2^320056664 is an apocalyptic number.

It is an amenable number.

320056664 is a deficient number, since it is larger than the sum of its proper divisors (280049596).

320056664 is a wasteful number, since it uses less digits than its factorization.

320056664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40007089 (or 40007085 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 320056664 is about 17890.1275568398. The cubic root of 320056664 is about 684.0307488200.

The spelling of 320056664 in words is "three hundred twenty million, fifty-six thousand, six hundred sixty-four".