118711661 has 2 divisors, whose sum is σ = 118711662. Its totient is φ = 118711660.

The previous prime is 118711643. The next prime is 118711667. The reversal of 118711661 is 166117811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113827561 + 4884100 = 10669^2 + 2210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118711661 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 (118711667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59355830 + 59355831.

It is an arithmetic number, because the mean of its divisors is an integer number (59355831).

Almost surely, 2^118711661 is an apocalyptic number.

It is an amenable number.

118711661 is a deficient number, since it is larger than the sum of its proper divisors (1).

118711661 is an equidigital number, since it uses as much as digits as its factorization.

118711661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 32.

The square root of 118711661 is about 10895.4881028800. The cubic root of 118711661 is about 491.4708836245.

The spelling of 118711661 in words is "one hundred eighteen million, seven hundred eleven thousand, six hundred sixty-one".