131660 has 24 divisors (see below), whose sum is σ = 287280. Its totient is φ = 50624.

The previous prime is 131641. The next prime is 131671. The reversal of 131660 is 66131.

It is an unprimeable number.

131660 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467 + ... + 693.

It is an arithmetic number, because the mean of its divisors is an integer number (11970).

2¹³¹⁶⁶⁰ is an apocalyptic number.

131660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143640).

131660 is an abundant number, since it is smaller than the sum of its proper divisors (155620).

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

131660 is a wasteful number, since it uses less digits than its factorization.

131660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 131660 is about 362.8498311974. The cubic root of 131660 is about 50.8726799788.

Adding to 131660 its reverse (66131), we get a palindrome (197791).

The spelling of 131660 in words is "one hundred thirty-one thousand, six hundred sixty".