660025172 has 6 divisors (see below), whose sum is σ = 1155044058. Its totient is φ = 330012584.

The previous prime is 660025169. The next prime is 660025199. The reversal of 660025172 is 271520066.

It can be written as a sum of positive squares in only one way, i.e., 530657296 + 129367876 = 23036^2 + 11374^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 82503143 + ... + 82503150.

It is an arithmetic number, because the mean of its divisors is an integer number (192507343).

Almost surely, 2^660025172 is an apocalyptic number.

It is an amenable number.

660025172 is a deficient number, since it is larger than the sum of its proper divisors (495018886).

660025172 is a wasteful number, since it uses less digits than its factorization.

660025172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165006297 (or 165006295 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 660025172 is about 25690.9550620447. The cubic root of 660025172 is about 870.6698377759.

The spelling of 660025172 in words is "six hundred sixty million, twenty-five thousand, one hundred seventy-two".