116716581 has 12 divisors (see below), whose sum is σ = 174029440. Its totient is φ = 75300840.

The previous prime is 116716571. The next prime is 116716591. The reversal of 116716581 is 185617611.

116716581 is a `hidden beast` number, since 1 + 1 + 6 + 71 + 6 + 581 = 666.

It is an interprime number because it is at equal distance from previous prime (116716571) and next prime (116716591).

It is not a de Polignac number, because 116716581 - 2⁶ = 116716517 is a prime.

It is a super-2 number, since 2×116716581² = 27245520560659122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116716571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208891 + ... + 209448.

Almost surely, 2^116716581 is an apocalyptic number.

It is an amenable number.

116716581 is a deficient number, since it is larger than the sum of its proper divisors (57312859).

116716581 is a wasteful number, since it uses less digits than its factorization.

116716581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418376 (or 418373 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 116716581 is about 10803.5448349141. The cubic root of 116716581 is about 488.7020780542.

The spelling of 116716581 in words is "one hundred sixteen million, seven hundred sixteen thousand, five hundred eighty-one".