166311312911 has 4 divisors (see below), whose sum is σ = 172046185800. Its totient is φ = 160576440024.

The previous prime is 166311312907. The next prime is 166311312941. The reversal of 166311312911 is 119213113661.

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

It is a cyclic number.

It is not a de Polignac number, because 166311312911 - 2² = 166311312907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166311312941) 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, 2867436401 + ... + 2867436458.

It is an arithmetic number, because the mean of its divisors is an integer number (43011546450).

Almost surely, 2^166311312911 is an apocalyptic number.

166311312911 is a deficient number, since it is larger than the sum of its proper divisors (5734872889).

166311312911 is an equidigital number, since it uses as much as digits as its factorization.

166311312911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5734872888.

The product of its digits is 5832, while the sum is 35.

The spelling of 166311312911 in words is "one hundred sixty-six billion, three hundred eleven million, three hundred twelve thousand, nine hundred eleven".