116515661 has 4 divisors (see below), whose sum is σ = 116622972. Its totient is φ = 116408352.

The previous prime is 116515601. The next prime is 116515667. The reversal of 116515661 is 166515611.

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 25694761 + 90820900 = 5069^2 + 9530^2 .

It is a cyclic number.

It is not a de Polignac number, because 116515661 - 2¹⁸ = 116253517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116515667) 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, 52010 + ... + 54203.

It is an arithmetic number, because the mean of its divisors is an integer number (29155743).

Almost surely, 2^116515661 is an apocalyptic number.

It is an amenable number.

116515661 is a deficient number, since it is larger than the sum of its proper divisors (107311).

116515661 is a wasteful number, since it uses less digits than its factorization.

116515661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107310.

The product of its digits is 5400, while the sum is 32.

The square root of 116515661 is about 10794.2420298972. The cubic root of 116515661 is about 488.4214940469.

The spelling of 116515661 in words is "one hundred sixteen million, five hundred fifteen thousand, six hundred sixty-one".