131646666 has 16 divisors (see below), whose sum is σ = 270409824. Its totient is φ = 42696144.

The previous prime is 131646653. The next prime is 131646707. The reversal of 131646666 is 666646131.

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, 296280 + ... + 296723.

It is an arithmetic number, because the mean of its divisors is an integer number (16900614).

Almost surely, 2^131646666 is an apocalyptic number.

131646666 is an abundant number, since it is smaller than the sum of its proper divisors (138763158).

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

131646666 is a wasteful number, since it uses less digits than its factorization.

131646666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593045.

The product of its digits is 93312, while the sum is 39.

The square root of 131646666 is about 11473.7381005494. The cubic root of 131646666 is about 508.7096252674.

The spelling of 131646666 in words is "one hundred thirty-one million, six hundred forty-six thousand, six hundred sixty-six".