166311925 has 24 divisors (see below), whose sum is σ = 225758120. Its totient is φ = 120787200.

The previous prime is 166311923. The next prime is 166311941. The reversal of 166311925 is 529113661.

It can be written as a sum of positive squares in 12 ways, for example, as 89889361 + 76422564 = 9481^2 + 8742^2 .

It is not a de Polignac number, because 166311925 - 2¹ = 166311923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166311923) by changing a digit.

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, 15631 + ... + 24019.

Almost surely, 2^166311925 is an apocalyptic number.

It is an amenable number.

166311925 is a deficient number, since it is larger than the sum of its proper divisors (59446195).

166311925 is a wasteful number, since it uses less digits than its factorization.

166311925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8473 (or 8468 counting only the distinct ones).

The product of its digits is 9720, while the sum is 34.

The square root of 166311925 is about 12896.1980831561. The cubic root of 166311925 is about 549.9304870826.

The spelling of 166311925 in words is "one hundred sixty-six million, three hundred eleven thousand, nine hundred twenty-five".