166887522 has 12 divisors (see below), whose sum is σ = 361589670. Its totient is φ = 55629168.

The previous prime is 166887493. The next prime is 166887527. The reversal of 166887522 is 225788661.

It can be written as a sum of positive squares in only one way, i.e., 92910321 + 73977201 = 9639^2 + 8601^2 .

It is not an unprimeable number, because it can be changed into a prime (166887527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4635747 + ... + 4635782.

Almost surely, 2^166887522 is an apocalyptic number.

166887522 is an abundant number, since it is smaller than the sum of its proper divisors (194702148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166887522 is a wasteful number, since it uses less digits than its factorization.

166887522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9271537 (or 9271534 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 166887522 is about 12918.4953458210. The cubic root of 166887522 is about 550.5641836036.

The spelling of 166887522 in words is "one hundred sixty-six million, eight hundred eighty-seven thousand, five hundred twenty-two".