166662904025 has 24 divisors (see below), whose sum is σ = 208121892888. Its totient is φ = 132390720000.

The previous prime is 166662904019. The next prime is 166662904043. The reversal of 166662904025 is 520409266661.

166662904025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 19173110089 + 147489793936 = 138467^2 + 384044^2 .

It is a de Polignac number, because none of the positive numbers 2^k-166662904025 is a prime.

It is a super-2 number, since 2×166662904025² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2963165 + ... + 3018885.

It is an arithmetic number, because the mean of its divisors is an integer number (8671745537).

Almost surely, 2^166662904025 is an apocalyptic number.

It is an amenable number.

166662904025 is a deficient number, since it is larger than the sum of its proper divisors (41458988863).

166662904025 is a wasteful number, since it uses less digits than its factorization.

166662904025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56573 (or 56568 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 166662904025 in words is "one hundred sixty-six billion, six hundred sixty-two million, nine hundred four thousand, twenty-five".