664318368 has 96 divisors (see below), whose sum is σ = 2214414720. Its totient is φ = 189803520.

The previous prime is 664318357. The next prime is 664318373. The reversal of 664318368 is 863813466.

It is a tau number, because it is divible by the number of its divisors (96).

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

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 15 ways as a sum of consecutive naturals, for example, 48873 + ... + 60968.

It is an arithmetic number, because the mean of its divisors is an integer number (23066820).

Almost surely, 2^664318368 is an apocalyptic number.

It is an amenable number.

664318368 is an abundant number, since it is smaller than the sum of its proper divisors (1550096352).

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

664318368 is a wasteful number, since it uses less digits than its factorization.

664318368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109867 (or 109853 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 664318368 is about 25774.3742504062. The cubic root of 664318368 is about 872.5535441124.

The spelling of 664318368 in words is "six hundred sixty-four million, three hundred eighteen thousand, three hundred sixty-eight".