116521665 has 32 divisors (see below), whose sum is σ = 201350016. Its totient is φ = 57200640.

The previous prime is 116521663. The next prime is 116521687. The reversal of 116521665 is 566125611.

It is not a de Polignac number, because 116521665 - 2¹ = 116521663 is a prime.

It is a super-3 number, since 3×116521665³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (116521663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95137 + ... + 96353.

It is an arithmetic number, because the mean of its divisors is an integer number (6292188).

Almost surely, 2^116521665 is an apocalyptic number.

116521665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

116521665 is a deficient number, since it is larger than the sum of its proper divisors (84828351).

116521665 is a wasteful number, since it uses less digits than its factorization.

116521665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729.

The product of its digits is 10800, while the sum is 33.

The square root of 116521665 is about 10794.5201375513. The cubic root of 116521665 is about 488.4298832833.

The spelling of 116521665 in words is "one hundred sixteen million, five hundred twenty-one thousand, six hundred sixty-five".