168686666886 has 16 divisors (see below), whose sum is σ = 337411851264. Its totient is φ = 56222469384.

The previous prime is 168686666867. The next prime is 168686666903. The reversal of 168686666886 is 688666686861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1547806 + ... + 1653201.

It is an arithmetic number, because the mean of its divisors is an integer number (21088240704).

Almost surely, 2^168686666886 is an apocalyptic number.

168686666886 is an abundant number, since it is smaller than the sum of its proper divisors (168725184378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168686666886 is a wasteful number, since it uses less digits than its factorization.

168686666886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3209795.

The product of its digits is 1146617856, while the sum is 75.

The spelling of 168686666886 in words is "one hundred sixty-eight billion, six hundred eighty-six million, six hundred sixty-six thousand, eight hundred eighty-six".