16866836687 has 8 divisors (see below), whose sum is σ = 17332758816. Its totient is φ = 16401444192.

The previous prime is 16866836611. The next prime is 16866836719. The reversal of 16866836687 is 78663866861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16866836687 - 2⁸ = 16866836431 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 (16866836587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67403 + ... + 195644.

It is an arithmetic number, because the mean of its divisors is an integer number (2166594852).

Almost surely, 2^16866836687 is an apocalyptic number.

16866836687 is a deficient number, since it is larger than the sum of its proper divisors (465922129).

16866836687 is a wasteful number, since it uses less digits than its factorization.

16866836687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264817.

The product of its digits is 83607552, while the sum is 65.

The spelling of 16866836687 in words is "sixteen billion, eight hundred sixty-six million, eight hundred thirty-six thousand, six hundred eighty-seven".