16666166675 has 12 divisors (see below), whose sum is σ = 21055973760. Its totient is φ = 13081367520.

The previous prime is 16666166633. The next prime is 16666166681. The reversal of 16666166675 is 57666166661.

It is not a de Polignac number, because 16666166675 - 2¹⁸ = 16665904531 is a prime.

It is a super-2 number, since 2×16666166675² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16666166675.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6287795 + ... + 6290444.

It is an arithmetic number, because the mean of its divisors is an integer number (1754664480).

Almost surely, 2^16666166675 is an apocalyptic number.

16666166675 is a deficient number, since it is larger than the sum of its proper divisors (4389807085).

16666166675 is a wasteful number, since it uses less digits than its factorization.

16666166675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12578302 (or 12578297 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 56.

The spelling of 16666166675 in words is "sixteen billion, six hundred sixty-six million, one hundred sixty-six thousand, six hundred seventy-five".