131365536666 has 64 divisors (see below), whose sum is σ = 340380364800. Its totient is φ = 32822387136.

The previous prime is 131365536641. The next prime is 131365536677. The reversal of 131365536666 is 666635563131.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6321106 + ... + 6341853.

It is an arithmetic number, because the mean of its divisors is an integer number (5318443200).

Almost surely, 2^131365536666 is an apocalyptic number.

131365536666 is an abundant number, since it is smaller than the sum of its proper divisors (209014828134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131365536666 is a wasteful number, since it uses less digits than its factorization.

131365536666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12663003.

The product of its digits is 5248800, while the sum is 51.

The spelling of 131365536666 in words is "one hundred thirty-one billion, three hundred sixty-five million, five hundred thirty-six thousand, six hundred sixty-six".