166655812 has 6 divisors (see below), whose sum is σ = 291647678. Its totient is φ = 83327904.

The previous prime is 166655809. The next prime is 166655833. The reversal of 166655812 is 218556661.

It can be written as a sum of positive squares in only one way, i.e., 94167616 + 72488196 = 9704^2 + 8514^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20831973 + ... + 20831980.

Almost surely, 2^166655812 is an apocalyptic number.

It is an amenable number.

166655812 is a deficient number, since it is larger than the sum of its proper divisors (124991866).

166655812 is a wasteful number, since it uses less digits than its factorization.

166655812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41663957 (or 41663955 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 166655812 is about 12909.5240810806. The cubic root of 166655812 is about 550.3092607832.

The spelling of 166655812 in words is "one hundred sixty-six million, six hundred fifty-five thousand, eight hundred twelve".