115666060661 has 2 divisors, whose sum is σ = 115666060662. Its totient is φ = 115666060660.

The previous prime is 115666060597. The next prime is 115666060667. The reversal of 115666060661 is 166060666511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115595920036 + 70140625 = 339994^2 + 8375^2 .

It is a cyclic number.

It is not a de Polignac number, because 115666060661 - 2⁶ = 115666060597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115666060667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57833030330 + 57833030331.

It is an arithmetic number, because the mean of its divisors is an integer number (57833030331).

Almost surely, 2^115666060661 is an apocalyptic number.

It is an amenable number.

115666060661 is a deficient number, since it is larger than the sum of its proper divisors (1).

115666060661 is an equidigital number, since it uses as much as digits as its factorization.

115666060661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 115666060661 in words is "one hundred fifteen billion, six hundred sixty-six million, sixty thousand, six hundred sixty-one".