166686868 has 12 divisors (see below), whose sum is σ = 292203072. Its totient is φ = 83200280.

The previous prime is 166686851. The next prime is 166686881. The reversal of 166686868 is 868686661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33148 + ... + 37843.

It is an arithmetic number, because the mean of its divisors is an integer number (24350256).

Almost surely, 2^166686868 is an apocalyptic number.

It is an amenable number.

166686868 is a deficient number, since it is larger than the sum of its proper divisors (125516204).

166686868 is a wasteful number, since it uses less digits than its factorization.

166686868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71582 (or 71580 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 55.

The square root of 166686868 is about 12910.7268579271. The cubic root of 166686868 is about 550.3434416952.

The spelling of 166686868 in words is "one hundred sixty-six million, six hundred eighty-six thousand, eight hundred sixty-eight".