166663684 has 12 divisors (see below), whose sum is σ = 318176208. Its totient is φ = 75756200.

The previous prime is 166663669. The next prime is 166663691. The reversal of 166663684 is 486366661.

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, 1893862 + ... + 1893949.

It is an arithmetic number, because the mean of its divisors is an integer number (26514684).

Almost surely, 2^166663684 is an apocalyptic number.

It is an amenable number.

166663684 is a deficient number, since it is larger than the sum of its proper divisors (151512524).

166663684 is a wasteful number, since it uses less digits than its factorization.

166663684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3787826 (or 3787824 counting only the distinct ones).

The product of its digits is 746496, while the sum is 46.

The square root of 166663684 is about 12909.8289686580. The cubic root of 166663684 is about 550.3179252801.

The spelling of 166663684 in words is "one hundred sixty-six million, six hundred sixty-three thousand, six hundred eighty-four".