131666465 has 16 divisors (see below), whose sum is σ = 183634560. Its totient is φ = 88753920.

The previous prime is 131666449. The next prime is 131666477. The reversal of 131666465 is 564666131.

It is not a de Polignac number, because 131666465 - 2⁴ = 131666449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29816 + ... + 33945.

It is an arithmetic number, because the mean of its divisors is an integer number (11477160).

Almost surely, 2^131666465 is an apocalyptic number.

It is an amenable number.

131666465 is a deficient number, since it is larger than the sum of its proper divisors (51968095).

131666465 is an equidigital number, since it uses as much as digits as its factorization.

131666465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63832.

The product of its digits is 77760, while the sum is 38.

The square root of 131666465 is about 11474.6008645181. The cubic root of 131666465 is about 508.7351264499.

The spelling of 131666465 in words is "one hundred thirty-one million, six hundred sixty-six thousand, four hundred sixty-five".