13131631666 has 16 divisors (see below), whose sum is σ = 19731872160. Its totient is φ = 6554353120.

The previous prime is 13131631663. The next prime is 13131631673. The reversal of 13131631666 is 66613613131.

It is a super-2 number, since 2×13131631666² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13131631663) 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, 4421430 + ... + 4424398.

It is an arithmetic number, because the mean of its divisors is an integer number (1233242010).

Almost surely, 2^13131631666 is an apocalyptic number.

13131631666 is a deficient number, since it is larger than the sum of its proper divisors (6600240494).

13131631666 is a wasteful number, since it uses less digits than its factorization.

13131631666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6089.

The product of its digits is 34992, while the sum is 37.

The spelling of 13131631666 in words is "thirteen billion, one hundred thirty-one million, six hundred thirty-one thousand, six hundred sixty-six".