16666683685 has 8 divisors (see below), whose sum is σ = 20465137440. Its totient is φ = 13023268944.

The previous prime is 16666683679. The next prime is 16666683713. The reversal of 16666683685 is 58638666661.

It is a happy number.

16666683685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16666683685 - 2⁵ = 16666683653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38759515 + ... + 38759944.

It is an arithmetic number, because the mean of its divisors is an integer number (2558142180).

Almost surely, 2^16666683685 is an apocalyptic number.

It is an amenable number.

16666683685 is a deficient number, since it is larger than the sum of its proper divisors (3798453755).

16666683685 is an equidigital number, since it uses as much as digits as its factorization.

16666683685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77519507.

The product of its digits is 44789760, while the sum is 61.

The spelling of 16666683685 in words is "sixteen billion, six hundred sixty-six million, six hundred eighty-three thousand, six hundred eighty-five".