131688066 has 16 divisors (see below), whose sum is σ = 263577600. Its totient is φ = 43862448.

The previous prime is 131688061. The next prime is 131688077. The reversal of 131688066 is 660886131.

It is not an unprimeable number, because it can be changed into a prime (131688061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895 + ... + 16253.

It is an arithmetic number, because the mean of its divisors is an integer number (16473600).

Almost surely, 2^131688066 is an apocalyptic number.

131688066 is an abundant number, since it is smaller than the sum of its proper divisors (131889534).

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

131688066 is a wasteful number, since it uses less digits than its factorization.

131688066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16793.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 131688066 is about 11475.5420786994. The cubic root of 131688066 is about 508.7629456990.

The spelling of 131688066 in words is "one hundred thirty-one million, six hundred eighty-eight thousand, sixty-six".