131666460 has 24 divisors (see below), whose sum is σ = 368666256. Its totient is φ = 35111040.

The previous prime is 131666449. The next prime is 131666477. The reversal of 131666460 is 64666131.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 1097161 + ... + 1097280.

It is an arithmetic number, because the mean of its divisors is an integer number (15361094).

Almost surely, 2^131666460 is an apocalyptic number.

131666460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131666460 is an abundant number, since it is smaller than the sum of its proper divisors (236999796).

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

131666460 is a wasteful number, since it uses less digits than its factorization.

131666460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194453 (or 2194451 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 131666460 is about 11474.6006466456. The cubic root of 131666460 is about 508.7351200102.

It can be divided in two parts, 1316 and 66460, that added together give a palindrome (67776).

The spelling of 131666460 in words is "one hundred thirty-one million, six hundred sixty-six thousand, four hundred sixty".