12166672166671 has 16 divisors (see below), whose sum is σ = 13850064783360. Its totient is φ = 10579519257120.

The previous prime is 12166672166633. The next prime is 12166672166683. The reversal of 12166672166671 is 17666127666121.

It is a happy number.

It is not a de Polignac number, because 12166672166671 - 2²⁹ = 12166135295759 is a prime.

It is a super-2 number, since 2×12166672166671² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166672166171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14214946 + ... + 15046528.

It is an arithmetic number, because the mean of its divisors is an integer number (865629048960).

Almost surely, 2^{12166672166671} is an apocalyptic number.

12166672166671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12166672166671 is a deficient number, since it is larger than the sum of its proper divisors (1683392616689).

12166672166671 is a wasteful number, since it uses less digits than its factorization.

12166672166671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889446.

The product of its digits is 9144576, while the sum is 58.

The spelling of 12166672166671 in words is "twelve trillion, one hundred sixty-six billion, six hundred seventy-two million, one hundred sixty-six thousand, six hundred seventy-one".