16701668685 has 24 divisors (see below), whose sum is σ = 31176449304. Its totient is φ = 8222359680.

The previous prime is 16701668681. The next prime is 16701668713. The reversal of 16701668685 is 58686610761.

It can be written as a sum of positive squares in 4 ways, for example, as 74597769 + 16627070916 = 8637^2 + 128946^2 .

It is not a de Polignac number, because 16701668685 - 2² = 16701668681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16701668681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14274346 + ... + 14275515.

It is an arithmetic number, because the mean of its divisors is an integer number (1299018721).

Almost surely, 2^16701668685 is an apocalyptic number.

16701668685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16701668685 is a deficient number, since it is larger than the sum of its proper divisors (14474780619).

16701668685 is a wasteful number, since it uses less digits than its factorization.

16701668685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28549885 (or 28549882 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 16701668685 in words is "sixteen billion, seven hundred one million, six hundred sixty-eight thousand, six hundred eighty-five".