16666866685 has 32 divisors (see below), whose sum is σ = 23181984000. Its totient is φ = 11267182080.

The previous prime is 16666866683. The next prime is 16666866707. The reversal of 16666866685 is 58666866661.

It is not a de Polignac number, because 16666866685 - 2¹ = 16666866683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666866683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1079470 + ... + 1094800.

It is an arithmetic number, because the mean of its divisors is an integer number (724437000).

Almost surely, 2^16666866685 is an apocalyptic number.

It is an amenable number.

16666866685 is a deficient number, since it is larger than the sum of its proper divisors (6515117315).

16666866685 is a wasteful number, since it uses less digits than its factorization.

16666866685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15781.

The product of its digits is 89579520, while the sum is 64.

The spelling of 16666866685 in words is "sixteen billion, six hundred sixty-six million, eight hundred sixty-six thousand, six hundred eighty-five".