660044172 has 24 divisors (see below), whose sum is σ = 1540537600. Its totient is φ = 219952656.

The previous prime is 660044129. The next prime is 660044183. The reversal of 660044172 is 271440066.

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 7 ways as a sum of consecutive naturals, for example, 60729 + ... + 70767.

Almost surely, 2^660044172 is an apocalyptic number.

It is an amenable number.

660044172 is an abundant number, since it is smaller than the sum of its proper divisors (880493428).

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

660044172 is a wasteful number, since it uses less digits than its factorization.

660044172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15525 (or 15523 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 660044172 is about 25691.3248393305. The cubic root of 660044172 is about 870.6781922897.

The spelling of 660044172 in words is "six hundred sixty million, forty-four thousand, one hundred seventy-two".