115666651 has 2 divisors, whose sum is σ = 115666652. Its totient is φ = 115666650.

The previous prime is 115666633. The next prime is 115666669. The reversal of 115666651 is 156666511.

It is a balanced prime because it is at equal distance from previous prime (115666633) and next prime (115666669).

It is a cyclic number.

It is not a de Polignac number, because 115666651 - 2⁵ = 115666619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115666651.

It is not a weakly prime, because it can be changed into another prime (115666601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57833325 + 57833326.

It is an arithmetic number, because the mean of its divisors is an integer number (57833326).

Almost surely, 2^115666651 is an apocalyptic number.

115666651 is a deficient number, since it is larger than the sum of its proper divisors (1).

115666651 is an equidigital number, since it uses as much as digits as its factorization.

115666651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 37.

The square root of 115666651 is about 10754.8431415804. The cubic root of 115666651 is about 487.2322804419.

The spelling of 115666651 in words is "one hundred fifteen million, six hundred sixty-six thousand, six hundred fifty-one".