664954368 has 80 divisors (see below), whose sum is σ = 1907804976. Its totient is φ = 204595200.

The previous prime is 664954349. The next prime is 664954373. The reversal of 664954368 is 863459466.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 664954368.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3318 + ... + 36618.

Almost surely, 2^664954368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664954368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953902488).

664954368 is an abundant number, since it is smaller than the sum of its proper divisors (1242850608).

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

664954368 is a wasteful number, since it uses less digits than its factorization.

664954368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33335 (or 33319 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The square root of 664954368 is about 25786.7091347461. The cubic root of 664954368 is about 872.8319081613.

The spelling of 664954368 in words is "six hundred sixty-four million, nine hundred fifty-four thousand, three hundred sixty-eight".