166661252 has 12 divisors (see below), whose sum is σ = 293185536. Its totient is φ = 82893960.

The previous prime is 166661237. The next prime is 166661273. The reversal of 166661252 is 252166661.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 108308 + ... + 109835.

It is an arithmetic number, because the mean of its divisors is an integer number (24432128).

Almost surely, 2^166661252 is an apocalyptic number.

It is an amenable number.

166661252 is a deficient number, since it is larger than the sum of its proper divisors (126524284).

166661252 is a wasteful number, since it uses less digits than its factorization.

166661252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218338 (or 218336 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 166661252 is about 12909.7347765165. The cubic root of 166661252 is about 550.3152484728.

The spelling of 166661252 in words is "one hundred sixty-six million, six hundred sixty-one thousand, two hundred fifty-two".