166506525 has 36 divisors (see below), whose sum is σ = 300631552. Its totient is φ = 88089120.

The previous prime is 166506493. The next prime is 166506533. The reversal of 166506525 is 525605661.

It is a happy number.

166506525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166506525 - 2⁵ = 166506493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166506525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25662 + ... + 31488.

Almost surely, 2^166506525 is an apocalyptic number.

166506525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166506525 is a deficient number, since it is larger than the sum of its proper divisors (134125027).

166506525 is a wasteful number, since it uses less digits than its factorization.

166506525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5970 (or 5962 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 166506525 is about 12903.7407367011. The cubic root of 166506525 is about 550.1448929553.

The spelling of 166506525 in words is "one hundred sixty-six million, five hundred six thousand, five hundred twenty-five".