16666666686 has 48 divisors (see below), whose sum is σ = 39897715104. Its totient is φ = 5001418752.

The previous prime is 16666666631. The next prime is 16666666697. The reversal of 16666666686 is 68666666661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1177011 + ... + 1191086.

It is an arithmetic number, because the mean of its divisors is an integer number (831202398).

Almost surely, 2^16666666686 is an apocalyptic number.

16666666686 is an abundant number, since it is smaller than the sum of its proper divisors (23231048418).

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

16666666686 is a wasteful number, since it uses less digits than its factorization.

16666666686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368145 (or 2368142 counting only the distinct ones).

The product of its digits is 80621568, while the sum is 63.

The spelling of 16666666686 in words is "sixteen billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred eighty-six".