664336368 has 60 divisors (see below), whose sum is σ = 1957080840. Its totient is φ = 209789568.

The previous prime is 664336367. The next prime is 664336381. The reversal of 664336368 is 863633466.

664336368 is a `hidden beast` number, since 6 + 6 + 4 + 3 + 3 + 636 + 8 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664336367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118671 + ... + 124142.

It is an arithmetic number, because the mean of its divisors is an integer number (32618014).

Almost surely, 2^664336368 is an apocalyptic number.

It is an amenable number.

664336368 is an abundant number, since it is smaller than the sum of its proper divisors (1292744472).

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

664336368 is a wasteful number, since it uses less digits than its factorization.

664336368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242846 (or 242837 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 45.

The square root of 664336368 is about 25774.7234320759. The cubic root of 664336368 is about 872.5614247826.

The spelling of 664336368 in words is "six hundred sixty-four million, three hundred thirty-six thousand, three hundred sixty-eight".