664922592 has 72 divisors (see below), whose sum is σ = 1909678680. Its totient is φ = 219436800.

The previous prime is 664922579. The next prime is 664922641. The reversal of 664922592 is 295229466.

664922592 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17659 + ... + 40517.

It is an arithmetic number, because the mean of its divisors is an integer number (26523315).

Almost surely, 2^664922592 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 664922592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (954839340).

664922592 is an abundant number, since it is smaller than the sum of its proper divisors (1244756088).

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

664922592 is a wasteful number, since it uses less digits than its factorization.

664922592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22976 (or 22965 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 664922592 is about 25786.0929960318. The cubic root of 664922592 is about 872.8180046767.

It can be divided in two parts, 6649 and 22592, that added together give a square (29241 = 171²).

The spelling of 664922592 in words is "six hundred sixty-four million, nine hundred twenty-two thousand, five hundred ninety-two".