664080064 has 28 divisors (see below), whose sum is σ = 1320011584. Its totient is φ = 331478784.

The previous prime is 664080041. The next prime is 664080073. The reversal of 664080064 is 460080466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30769 + ... + 47695.

Almost surely, 2^664080064 is an apocalyptic number.

664080064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

664080064 is a deficient number, since it is larger than the sum of its proper divisors (655931520).

664080064 is a wasteful number, since it uses less digits than its factorization.

664080064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17552 (or 17542 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 664080064 is about 25769.7509495144. The cubic root of 664080064 is about 872.4491976233.

The spelling of 664080064 in words is "six hundred sixty-four million, eighty thousand, sixty-four".