131455117666 has 16 divisors (see below), whose sum is σ = 204787363320. Its totient is φ = 63232583040.

The previous prime is 131455117613. The next prime is 131455117679. The reversal of 131455117666 is 666711554131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 92242801225 + 39212316441 = 303715^2 + 198021^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9973305 + ... + 9986476.

Almost surely, 2^131455117666 is an apocalyptic number.

131455117666 is a deficient number, since it is larger than the sum of its proper divisors (73332245654).

131455117666 is a wasteful number, since it uses less digits than its factorization.

131455117666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19959909.

The product of its digits is 453600, while the sum is 46.

The spelling of 131455117666 in words is "one hundred thirty-one billion, four hundred fifty-five million, one hundred seventeen thousand, six hundred sixty-six".