118665571 has 2 divisors, whose sum is σ = 118665572. Its totient is φ = 118665570.

The previous prime is 118665541. The next prime is 118665581. The reversal of 118665571 is 175566811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 118665571 - 2⁹ = 118665059 is a prime.

It is not a weakly prime, because it can be changed into another prime (118665541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59332785 + 59332786.

It is an arithmetic number, because the mean of its divisors is an integer number (59332786).

Almost surely, 2^118665571 is an apocalyptic number.

118665571 is a deficient number, since it is larger than the sum of its proper divisors (1).

118665571 is an equidigital number, since it uses as much as digits as its factorization.

118665571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 40.

The square root of 118665571 is about 10893.3728018461. The cubic root of 118665571 is about 491.4072705950.

The spelling of 118665571 in words is "one hundred eighteen million, six hundred sixty-five thousand, five hundred seventy-one".