115660661 has 8 divisors (see below), whose sum is σ = 117321600. Its totient is φ = 114004800.

The previous prime is 115660637. The next prime is 115660667. The reversal of 115660661 is 166066511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115660661 - 2²² = 111466357 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 (115660667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78986 + ... + 80436.

It is an arithmetic number, because the mean of its divisors is an integer number (14665200).

Almost surely, 2^115660661 is an apocalyptic number.

It is an amenable number.

115660661 is a deficient number, since it is larger than the sum of its proper divisors (1660939).

115660661 is a wasteful number, since it uses less digits than its factorization.

115660661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 115660661 is about 10754.5646587856. The cubic root of 115660661 is about 487.2238695712.

The spelling of 115660661 in words is "one hundred fifteen million, six hundred sixty thousand, six hundred sixty-one".