131666458 has 32 divisors (see below), whose sum is σ = 251486208. Its totient is φ = 50204400.

The previous prime is 131666449. The next prime is 131666477. The reversal of 131666458 is 854666131.

It is a self number, because there is not a number n which added to its sum of digits gives 131666458.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1858 + ... + 16333.

It is an arithmetic number, because the mean of its divisors is an integer number (7858944).

Almost surely, 2^131666458 is an apocalyptic number.

131666458 is a deficient number, since it is larger than the sum of its proper divisors (119819750).

131666458 is a wasteful number, since it uses less digits than its factorization.

131666458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18258.

The product of its digits is 103680, while the sum is 40.

The square root of 131666458 is about 11474.6005594966. The cubic root of 131666458 is about 508.7351174344.

The spelling of 131666458 in words is "one hundred thirty-one million, six hundred sixty-six thousand, four hundred fifty-eight".