18668370166671 has 8 divisors (see below), whose sum is σ = 25749476092080. Its totient is φ = 12016422176192.

The previous prime is 18668370166661. The next prime is 18668370166687. The reversal of 18668370166671 is 17666107386681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18668370166671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18668370166601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107289483630 + ... + 107289483803.

It is an arithmetic number, because the mean of its divisors is an integer number (3218684511510).

Almost surely, 2^{18668370166671} is an apocalyptic number.

18668370166671 is a deficient number, since it is larger than the sum of its proper divisors (7081105925409).

18668370166671 is a wasteful number, since it uses less digits than its factorization.

18668370166671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214578967465.

The product of its (nonzero) digits is 73156608, while the sum is 66.

The spelling of 18668370166671 in words is "eighteen trillion, six hundred sixty-eight billion, three hundred seventy million, one hundred sixty-six thousand, six hundred seventy-one".