166939912 has 8 divisors (see below), whose sum is σ = 313012350. Its totient is φ = 83469952.

The previous prime is 166939907. The next prime is 166939919. The reversal of 166939912 is 219939661.

It can be written as a sum of positive squares in only one way, i.e., 87123556 + 79816356 = 9334^2 + 8934^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (166939919) by changing a digit.

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 as a sum of consecutive naturals, namely, 10433737 + ... + 10433752.

Almost surely, 2^166939912 is an apocalyptic number.

It is an amenable number.

166939912 is a deficient number, since it is larger than the sum of its proper divisors (146072438).

166939912 is a wasteful number, since it uses less digits than its factorization.

166939912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20867495 (or 20867491 counting only the distinct ones).

The product of its digits is 157464, while the sum is 46.

The square root of 166939912 is about 12920.5228996353. The cubic root of 166939912 is about 550.6217893480.

The spelling of 166939912 in words is "one hundred sixty-six million, nine hundred thirty-nine thousand, nine hundred twelve".