131385666 has 8 divisors (see below), whose sum is σ = 262771344. Its totient is φ = 43795220.

The previous prime is 131385659. The next prime is 131385697. The reversal of 131385666 is 666583131.

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

131385666 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 10948800 + ... + 10948811.

It is an arithmetic number, because the mean of its divisors is an integer number (32846418).

Almost surely, 2^131385666 is an apocalyptic number.

131385666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

131385666 is a wasteful number, since it uses less digits than its factorization.

131385666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21897616.

The product of its digits is 77760, while the sum is 39.

The square root of 131385666 is about 11462.3586577981. The cubic root of 131385666 is about 508.3732170683.

The spelling of 131385666 in words is "one hundred thirty-one million, three hundred eighty-five thousand, six hundred sixty-six".