116610261665 has 4 divisors (see below), whose sum is σ = 139932314004. Its totient is φ = 93288209328.

The previous prime is 116610261661. The next prime is 116610261679. The reversal of 116610261665 is 566162016611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91301269921 + 25308991744 = 302161^2 + 159088^2 .

It is a cyclic number.

It is not a de Polignac number, because 116610261665 - 2² = 116610261661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (116610261661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11661026162 + ... + 11661026171.

It is an arithmetic number, because the mean of its divisors is an integer number (34983078501).

Almost surely, 2^116610261665 is an apocalyptic number.

It is an amenable number.

116610261665 is a deficient number, since it is larger than the sum of its proper divisors (23322052339).

116610261665 is an equidigital number, since it uses as much as digits as its factorization.

116610261665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23322052338.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 116610261665 in words is "one hundred sixteen billion, six hundred ten million, two hundred sixty-one thousand, six hundred sixty-five".