131210397666 has 16 divisors (see below), whose sum is σ = 291578661600. Its totient is φ = 43736799204.

The previous prime is 131210397629. The next prime is 131210397667. The reversal of 131210397666 is 666793012131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (131210397667) 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 7 ways as a sum of consecutive naturals, for example, 1214911036 + ... + 1214911143.

It is an arithmetic number, because the mean of its divisors is an integer number (18223666350).

Almost surely, 2^131210397666 is an apocalyptic number.

131210397666 is an abundant number, since it is smaller than the sum of its proper divisors (160368263934).

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

131210397666 is a wasteful number, since it uses less digits than its factorization.

131210397666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429822190 (or 2429822184 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 131210397666 in words is "one hundred thirty-one billion, two hundred ten million, three hundred ninety-seven thousand, six hundred sixty-six".