131616660 has 48 divisors (see below), whose sum is σ = 421174656. Its totient is φ = 30083712.

The previous prime is 131616647. The next prime is 131616673. The reversal of 131616660 is 66616131.

It is an interprime number because it is at equal distance from previous prime (131616647) and next prime (131616673).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 156267 + ... + 157106.

It is an arithmetic number, because the mean of its divisors is an integer number (8774472).

Almost surely, 2^131616660 is an apocalyptic number.

131616660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131616660 is an abundant number, since it is smaller than the sum of its proper divisors (289557996).

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

131616660 is a wasteful number, since it uses less digits than its factorization.

131616660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313392 (or 313390 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 131616660 is about 11472.4304312556. The cubic root of 131616660 is about 508.6709725582.

The spelling of 131616660 in words is "one hundred thirty-one million, six hundred sixteen thousand, six hundred sixty".