166111525 has 12 divisors (see below), whose sum is σ = 206869572. Its totient is φ = 132314240.

The previous prime is 166111523. The next prime is 166111553. The reversal of 166111525 is 525111661.

It is a happy number.

166111525 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 6 ways, for example, as 1425636 + 164685889 = 1194^2 + 12833^2 .

It is not a de Polignac number, because 166111525 - 2¹ = 166111523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166111493 and 166111502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166111523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8434 + ... + 20083.

It is an arithmetic number, because the mean of its divisors is an integer number (17239131).

Almost surely, 2^166111525 is an apocalyptic number.

It is an amenable number.

166111525 is a deficient number, since it is larger than the sum of its proper divisors (40758047).

166111525 is a wasteful number, since it uses less digits than its factorization.

166111525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28760 (or 28755 counting only the distinct ones).

The product of its digits is 1800, while the sum is 28.

The square root of 166111525 is about 12888.4260094086. The cubic root of 166111525 is about 549.7095160286.

The spelling of 166111525 in words is "one hundred sixty-six million, one hundred eleven thousand, five hundred twenty-five".