131660864 has 28 divisors (see below), whose sum is σ = 262230108. Its totient is φ = 65587200.

The previous prime is 131660857. The next prime is 131660887. The reversal of 131660864 is 468066131.

It can be written as a sum of positive squares in 2 ways, for example, as 29246464 + 102414400 = 5408^2 + 10120^2 .

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, 14324 + ... + 21644.

It is an arithmetic number, because the mean of its divisors is an integer number (9365361).

Almost surely, 2^131660864 is an apocalyptic number.

It is an amenable number.

131660864 is a deficient number, since it is larger than the sum of its proper divisors (130569244).

131660864 is an equidigital number, since it uses as much as digits as its factorization.

131660864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7614 (or 7604 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 131660864 is about 11474.3568011458. The cubic root of 131660864 is about 508.7279126013.

The spelling of 131660864 in words is "one hundred thirty-one million, six hundred sixty thousand, eight hundred sixty-four".