163686866 has 16 divisors (see below), whose sum is σ = 280791360. Its totient is φ = 70105200.

The previous prime is 163686847. The next prime is 163686907. The reversal of 163686866 is 668686361.

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 7 ways as a sum of consecutive naturals, for example, 26141 + ... + 31791.

It is an arithmetic number, because the mean of its divisors is an integer number (17549460).

Almost surely, 2^163686866 is an apocalyptic number.

163686866 is a deficient number, since it is larger than the sum of its proper divisors (117104494).

163686866 is a wasteful number, since it uses less digits than its factorization.

163686866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7729.

The product of its digits is 1492992, while the sum is 50.

The square root of 163686866 is about 12794.0168047412. The cubic root of 163686866 is about 547.0217709830.

The spelling of 163686866 in words is "one hundred sixty-three million, six hundred eighty-six thousand, eight hundred sixty-six".