16685366836687 has 16 divisors (see below), whose sum is σ = 17403998875200. Its totient is φ = 15982751457792.

The previous prime is 16685366836681. The next prime is 16685366836693. The reversal of 16685366836687 is 78663866358661.

It is an interprime number because it is at equal distance from previous prime (16685366836681) and next prime (16685366836693).

It is not a de Polignac number, because 16685366836687 - 2³ = 16685366836679 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 (16685366836681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12768843 + ... + 14014780.

It is an arithmetic number, because the mean of its divisors is an integer number (1087749929700).

Almost surely, 2^{16685366836687} is an apocalyptic number.

16685366836687 is a deficient number, since it is larger than the sum of its proper divisors (718632038513).

16685366836687 is a wasteful number, since it uses less digits than its factorization.

16685366836687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26783922.

The product of its digits is 7524679680, while the sum is 79.

The spelling of 16685366836687 in words is "sixteen trillion, six hundred eighty-five billion, three hundred sixty-six million, eight hundred thirty-six thousand, six hundred eighty-seven".