166565125 has 16 divisors (see below), whose sum is σ = 215046000. Its totient is φ = 128654400.

The previous prime is 166565123. The next prime is 166565137. The reversal of 166565125 is 521565661.

166565125 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 8 ways, for example, as 25573249 + 140991876 = 5057^2 + 11874^2 .

It is not a de Polignac number, because 166565125 - 2¹ = 166565123 is a prime.

It is a super-3 number, since 3×166565125³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166565123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19350 + ... + 26599.

It is an arithmetic number, because the mean of its divisors is an integer number (13440375).

Almost surely, 2^166565125 is an apocalyptic number.

It is an amenable number.

166565125 is a deficient number, since it is larger than the sum of its proper divisors (48480875).

166565125 is an equidigital number, since it uses as much as digits as its factorization.

166565125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45993 (or 45983 counting only the distinct ones).

The product of its digits is 54000, while the sum is 37.

The square root of 166565125 is about 12906.0111963379. The cubic root of 166565125 is about 550.2094243793.

The spelling of 166565125 in words is "one hundred sixty-six million, five hundred sixty-five thousand, one hundred twenty-five".