16686648064 has 36 divisors (see below), whose sum is σ = 33321565984. Its totient is φ = 8339954688.

The previous prime is 16686648007. The next prime is 16686648067. The reversal of 16686648064 is 46084668661.

It is a super-2 number, since 2×16686648064² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16686647996 and 16686648014.

It is not an unprimeable number, because it can be changed into a prime (16686648067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696574 + ... + 720130.

Almost surely, 2^16686648064 is an apocalyptic number.

It is an amenable number.

16686648064 is a deficient number, since it is larger than the sum of its proper divisors (16634917920).

16686648064 is an equidigital number, since it uses as much as digits as its factorization.

16686648064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26340 (or 26326 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 55.

The spelling of 16686648064 in words is "sixteen billion, six hundred eighty-six million, six hundred forty-eight thousand, sixty-four".