131664616 has 8 divisors (see below), whose sum is σ = 246871170. Its totient is φ = 65832304.

The previous prime is 131664613. The next prime is 131664619. The reversal of 131664616 is 616466131.

It is an interprime number because it is at equal distance from previous prime (131664613) and next prime (131664619).

It can be written as a sum of positive squares in only one way, i.e., 107122500 + 24542116 = 10350^2 + 4954^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×131664616² = 34671142212854912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131664613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8229031 + ... + 8229046.

Almost surely, 2^131664616 is an apocalyptic number.

It is an amenable number.

131664616 is a deficient number, since it is larger than the sum of its proper divisors (115206554).

131664616 is a wasteful number, since it uses less digits than its factorization.

131664616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16458083 (or 16458079 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 131664616 is about 11474.5202949840. The cubic root of 131664616 is about 508.7327450396.

The spelling of 131664616 in words is "one hundred thirty-one million, six hundred sixty-four thousand, six hundred sixteen".