116561665 has 16 divisors (see below), whose sum is σ = 152801280. Its totient is φ = 84654720.

The previous prime is 116561651. The next prime is 116561671. The reversal of 116561665 is 566165611.

It is not a de Polignac number, because 116561665 - 2⁵ = 116561633 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69517 + ... + 71173.

It is an arithmetic number, because the mean of its divisors is an integer number (9550080).

Almost surely, 2^116561665 is an apocalyptic number.

It is an amenable number.

116561665 is a deficient number, since it is larger than the sum of its proper divisors (36239615).

116561665 is a wasteful number, since it uses less digits than its factorization.

116561665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952.

The product of its digits is 32400, while the sum is 37.

The square root of 116561665 is about 10796.3727705188. The cubic root of 116561665 is about 488.4857669114.

The spelling of 116561665 in words is "one hundred sixteen million, five hundred sixty-one thousand, six hundred sixty-five".