664327032 has 64 divisors (see below), whose sum is σ = 1742376960. Its totient is φ = 210672000.

The previous prime is 664327021. The next prime is 664327057. The reversal of 664327032 is 230723466.

It is a junction number, because it is equal to n+sod(n) for n = 664326984 and 664327002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102282 + ... + 108582.

It is an arithmetic number, because the mean of its divisors is an integer number (27224640).

Almost surely, 2^664327032 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 664327032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871188480).

664327032 is an abundant number, since it is smaller than the sum of its proper divisors (1078049928).

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

664327032 is a wasteful number, since it uses less digits than its factorization.

664327032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6524 (or 6520 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 33.

The square root of 664327032 is about 25774.5423237737. The cubic root of 664327032 is about 872.5573373594.

The spelling of 664327032 in words is "six hundred sixty-four million, three hundred twenty-seven thousand, thirty-two".