13166066231631 has 12 divisors (see below), whose sum is σ = 19722008676552. Its totient is φ = 8777377487592.

The previous prime is 13166066231627. The next prime is 13166066231693. The reversal of 13166066231631 is 13613266066131.

13166066231631 is a `hidden beast` number, since 1 + 3 + 1 + 6 + 6 + 0 + 6 + 6 + 2 + 3 + 1 + 631 = 666.

It is not a de Polignac number, because 13166066231631 - 2² = 13166066231627 is a prime.

It is a super-2 number, since 2×13166066231631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13166066281631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27090671016 + ... + 27090671501.

It is an arithmetic number, because the mean of its divisors is an integer number (1643500723046).

Almost surely, 2^{13166066231631} is an apocalyptic number.

13166066231631 is a deficient number, since it is larger than the sum of its proper divisors (6555942444921).

13166066231631 is an frugal number, since it uses more digits than its factorization.

13166066231631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54181342532 (or 54181342520 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The spelling of 13166066231631 in words is "thirteen trillion, one hundred sixty-six billion, sixty-six million, two hundred thirty-one thousand, six hundred thirty-one".