664132044 has 12 divisors (see below), whose sum is σ = 1549641464. Its totient is φ = 221377344.

The previous prime is 664132039. The next prime is 664132057. The reversal of 664132044 is 440231466.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 27672157 + ... + 27672180.

Almost surely, 2^664132044 is an apocalyptic number.

It is an amenable number.

664132044 is an abundant number, since it is smaller than the sum of its proper divisors (885509420).

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

664132044 is a wasteful number, since it uses less digits than its factorization.

664132044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55344344 (or 55344342 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 664132044 is about 25770.7594765851. The cubic root of 664132044 is about 872.4719603034.

The spelling of 664132044 in words is "six hundred sixty-four million, one hundred thirty-two thousand, forty-four".