16628166807677 has 32 divisors (see below), whose sum is σ = 17664681099264. Its totient is φ = 15624732038400.

The previous prime is 16628166807647. The next prime is 16628166807689. The reversal of 16628166807677 is 77670866182661.

It is a cyclic number.

It is not a de Polignac number, because 16628166807677 - 2²² = 16628162613373 is a prime.

It is a super-2 number, since 2×16628166807677² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16628166807677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16628166807647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1173221363 + ... + 1173235535.

It is an arithmetic number, because the mean of its divisors is an integer number (552021284352).

Almost surely, 2^{16628166807677} is an apocalyptic number.

It is an amenable number.

16628166807677 is a deficient number, since it is larger than the sum of its proper divisors (1036514291587).

16628166807677 is a wasteful number, since it uses less digits than its factorization.

16628166807677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16269.

The product of its (nonzero) digits is 341397504, while the sum is 71.

The spelling of 16628166807677 in words is "sixteen trillion, six hundred twenty-eight billion, one hundred sixty-six million, eight hundred seven thousand, six hundred seventy-seven".