2166366522231 has 24 divisors (see below), whose sum is σ = 3164989464000. Its totient is φ = 1427730830592.

The previous prime is 2166366522227. The next prime is 2166366522233. The reversal of 2166366522231 is 1322256636612.

2166366522231 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 366 + 52 + 2 + 231 = 666.

It is not a de Polignac number, because 2166366522231 - 2² = 2166366522227 is a prime.

It is a super-2 number, since 2×2166366522231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166366522233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3767875 + ... + 4304603.

It is an arithmetic number, because the mean of its divisors is an integer number (131874561000).

Almost surely, 2^{2166366522231} is an apocalyptic number.

2166366522231 is a deficient number, since it is larger than the sum of its proper divisors (998622941769).

2166366522231 is a wasteful number, since it uses less digits than its factorization.

2166366522231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541863 (or 541860 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The spelling of 2166366522231 in words is "two trillion, one hundred sixty-six billion, three hundred sixty-six million, five hundred twenty-two thousand, two hundred thirty-one".