16686699131 has 6 divisors (see below), whose sum is σ = 16974321732. Its totient is φ = 16403870300.

The previous prime is 16686699103. The next prime is 16686699149. The reversal of 16686699131 is 13199668661.

It is a de Polignac number, because none of the positive numbers 2^k-16686699131 is a prime.

It is a super-2 number, since 2×16686699131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16686699331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2393345 + ... + 2400306.

It is an arithmetic number, because the mean of its divisors is an integer number (2829053622).

Almost surely, 2^16686699131 is an apocalyptic number.

16686699131 is a deficient number, since it is larger than the sum of its proper divisors (287622601).

16686699131 is an frugal number, since it uses more digits than its factorization.

16686699131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793769 (or 4793710 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 56.

The spelling of 16686699131 in words is "sixteen billion, six hundred eighty-six million, six hundred ninety-nine thousand, one hundred thirty-one".