120665771 has 2 divisors, whose sum is σ = 120665772. Its totient is φ = 120665770.

The previous prime is 120665759. The next prime is 120665773. The reversal of 120665771 is 177566021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120665771 - 2¹⁴ = 120649387 is a prime.

It is a Sophie Germain prime.

Together with 120665773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120665773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60332885 + 60332886.

It is an arithmetic number, because the mean of its divisors is an integer number (60332886).

Almost surely, 2^120665771 is an apocalyptic number.

120665771 is a deficient number, since it is larger than the sum of its proper divisors (1).

120665771 is an equidigital number, since it uses as much as digits as its factorization.

120665771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 120665771 is about 10984.7972671324. The cubic root of 120665771 is about 494.1529177957.

The spelling of 120665771 in words is "one hundred twenty million, six hundred sixty-five thousand, seven hundred seventy-one".