131912666 has 8 divisors (see below), whose sum is σ = 199828404. Its totient is φ = 65303200.

The previous prime is 131912653. The next prime is 131912743. The reversal of 131912666 is 666219131.

131912666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 81090025 + 50822641 = 9005^2 + 7129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326315 + ... + 326718.

Almost surely, 2^131912666 is an apocalyptic number.

131912666 is a deficient number, since it is larger than the sum of its proper divisors (67915738).

131912666 is a wasteful number, since it uses less digits than its factorization.

131912666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653136.

The product of its digits is 11664, while the sum is 35.

The square root of 131912666 is about 11485.3239397067. The cubic root of 131912666 is about 509.0520208835.

The spelling of 131912666 in words is "one hundred thirty-one million, nine hundred twelve thousand, six hundred sixty-six".