16683683686687 has 4 divisors (see below), whose sum is σ = 16884691923960. Its totient is φ = 16482675449416.

The previous prime is 16683683686667. The next prime is 16683683686757. The reversal of 16683683686687 is 78668638638661.

16683683686687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16683683686687 - 2³⁵ = 16649323948319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16683683686687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16683683686627) 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, 100504118512 + ... + 100504118677.

It is an arithmetic number, because the mean of its divisors is an integer number (4221172980990).

Almost surely, 2^{16683683686687} is an apocalyptic number.

16683683686687 is a deficient number, since it is larger than the sum of its proper divisors (201008237273).

16683683686687 is an equidigital number, since it uses as much as digits as its factorization.

16683683686687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201008237272.

The product of its digits is 12039487488, while the sum is 82.

The spelling of 16683683686687 in words is "sixteen trillion, six hundred eighty-three billion, six hundred eighty-three million, six hundred eighty-six thousand, six hundred eighty-seven".