118665126661 has 2 divisors, whose sum is σ = 118665126662. Its totient is φ = 118665126660.

The previous prime is 118665126617. The next prime is 118665126667. The reversal of 118665126661 is 166621566811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66146696100 + 52518430561 = 257190^2 + 229169^2 .

It is a cyclic number.

It is not a de Polignac number, because 118665126661 - 2⁷ = 118665126533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118665126667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59332563330 + 59332563331.

It is an arithmetic number, because the mean of its divisors is an integer number (59332563331).

Almost surely, 2^118665126661 is an apocalyptic number.

It is an amenable number.

118665126661 is a deficient number, since it is larger than the sum of its proper divisors (1).

118665126661 is an equidigital number, since it uses as much as digits as its factorization.

118665126661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 49.

The spelling of 118665126661 in words is "one hundred eighteen billion, six hundred sixty-five million, one hundred twenty-six thousand, six hundred sixty-one".