664922368 has 72 divisors (see below), whose sum is σ = 1454019840. Its totient is φ = 300963840.

The previous prime is 664922359. The next prime is 664922369. The reversal of 664922368 is 863229466.

It is not an unprimeable number, because it can be changed into a prime (664922369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095121 + ... + 1095727.

It is an arithmetic number, because the mean of its divisors is an integer number (20194720).

Almost surely, 2^664922368 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 664922368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (727009920).

664922368 is an abundant number, since it is smaller than the sum of its proper divisors (789097472).

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

664922368 is a wasteful number, since it uses less digits than its factorization.

664922368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1009 counting only the distinct ones).

The product of its digits is 746496, while the sum is 46.

The square root of 664922368 is about 25786.0886526049. The cubic root of 664922368 is about 872.8179066647.

The spelling of 664922368 in words is "six hundred sixty-four million, nine hundred twenty-two thousand, three hundred sixty-eight".