664225016 has 32 divisors (see below), whose sum is σ = 1532828640. Its totient is φ = 262770048.

The previous prime is 664224997. The next prime is 664225039. The reversal of 664225016 is 610522466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455471 + ... + 456926.

It is an arithmetic number, because the mean of its divisors is an integer number (47900895).

Almost surely, 2^664225016 is an apocalyptic number.

It is an amenable number.

664225016 is an abundant number, since it is smaller than the sum of its proper divisors (868603624).

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

664225016 is a wasteful number, since it uses less digits than its factorization.

664225016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912423 (or 912419 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 664225016 is about 25772.5632407799. The cubic root of 664225016 is about 872.5126709216.

The spelling of 664225016 in words is "six hundred sixty-four million, two hundred twenty-five thousand, sixteen".