664958952 has 96 divisors (see below), whose sum is σ = 2078743680. Its totient is φ = 188092800.

The previous prime is 664958947. The next prime is 664958963. The reversal of 664958952 is 259859466.

It is a happy number.

664958952 is a `hidden beast` number, since 6 + 6 + 4 + 9 + 589 + 52 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44373 + ... + 57435.

It is an arithmetic number, because the mean of its divisors is an integer number (21653580).

Almost surely, 2^664958952 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 664958952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1039371840).

664958952 is an abundant number, since it is smaller than the sum of its proper divisors (1413784728).

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

664958952 is a wasteful number, since it uses less digits than its factorization.

664958952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13183 (or 13176 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 664958952 is about 25786.7980175903. The cubic root of 664958952 is about 872.8339138389.

The spelling of 664958952 in words is "six hundred sixty-four million, nine hundred fifty-eight thousand, nine hundred fifty-two".