166086925 has 12 divisors (see below), whose sum is σ = 207990036. Its totient is φ = 131552000.

The previous prime is 166086919. The next prime is 166086929. The reversal of 166086925 is 529680661.

It can be written as a sum of positive squares in 6 ways, for example, as 8684809 + 157402116 = 2947^2 + 12546^2 .

It is not a de Polignac number, because 166086925 - 2⁷ = 166086797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166086929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30364 + ... + 35413.

It is an arithmetic number, because the mean of its divisors is an integer number (17332503).

Almost surely, 2^166086925 is an apocalyptic number.

It is an amenable number.

166086925 is a deficient number, since it is larger than the sum of its proper divisors (41903111).

166086925 is a wasteful number, since it uses less digits than its factorization.

166086925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65888 (or 65883 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 166086925 is about 12887.4716294547. The cubic root of 166086925 is about 549.6823785945.

The spelling of 166086925 in words is "one hundred sixty-six million, eighty-six thousand, nine hundred twenty-five".