166025631 has 8 divisors (see below), whose sum is σ = 222960640. Its totient is φ = 109887192.

The previous prime is 166025611. The next prime is 166025641. The reversal of 166025631 is 136520661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166025631 - 2⁵ = 166025599 is a prime.

It is a super-2 number, since 2×166025631² = 55129020297896322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166025611) by changing a digit.

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, 198655 + ... + 199488.

It is an arithmetic number, because the mean of its divisors is an integer number (27870080).

Almost surely, 2^166025631 is an apocalyptic number.

166025631 is a deficient number, since it is larger than the sum of its proper divisors (56935009).

166025631 is a wasteful number, since it uses less digits than its factorization.

166025631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398285.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 166025631 is about 12885.0933640389. The cubic root of 166025631 is about 549.6147505994.

The spelling of 166025631 in words is "one hundred sixty-six million, twenty-five thousand, six hundred thirty-one".