16886666687 has 4 divisors (see below), whose sum is σ = 18421818216. Its totient is φ = 15351515160.

The previous prime is 16886666581. The next prime is 16886666773. The reversal of 16886666687 is 78666668861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16886666687 - 2¹⁸ = 16886404543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16886666387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767575748 + ... + 767575769.

It is an arithmetic number, because the mean of its divisors is an integer number (4605454554).

Almost surely, 2^16886666687 is an apocalyptic number.

16886666687 is a deficient number, since it is larger than the sum of its proper divisors (1535151529).

16886666687 is a wasteful number, since it uses less digits than its factorization.

16886666687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535151528.

The product of its digits is 167215104, while the sum is 68.

The spelling of 16886666687 in words is "sixteen billion, eight hundred eighty-six million, six hundred sixty-six thousand, six hundred eighty-seven".