16676385637 has 4 divisors (see below), whose sum is σ = 17657349516. Its totient is φ = 15695421760.

The previous prime is 16676385623. The next prime is 16676385643. The reversal of 16676385637 is 73658367661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15621500196 + 1054885441 = 124986^2 + 32479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16676385637 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16676388637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490481914 + ... + 490481947.

It is an arithmetic number, because the mean of its divisors is an integer number (4414337379).

Almost surely, 2^16676385637 is an apocalyptic number.

16676385637 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16676385637 is a deficient number, since it is larger than the sum of its proper divisors (980963879).

16676385637 is an equidigital number, since it uses as much as digits as its factorization.

16676385637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980963878.

The product of its digits is 22861440, while the sum is 58.

The spelling of 16676385637 in words is "sixteen billion, six hundred seventy-six million, three hundred eighty-five thousand, six hundred thirty-seven".