65765009 has 2 divisors, whose sum is σ = 65765010. Its totient is φ = 65765008.

The previous prime is 65764987. The next prime is 65765033. The reversal of 65765009 is 90056756.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65691025 + 73984 = 8105^2 + 272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65765009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (65765509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32882504 + 32882505.

It is an arithmetic number, because the mean of its divisors is an integer number (32882505).

Almost surely, 2^65765009 is an apocalyptic number.

It is an amenable number.

65765009 is a deficient number, since it is larger than the sum of its proper divisors (1).

65765009 is an equidigital number, since it uses as much as digits as its factorization.

65765009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 65765009 is about 8109.5628118907. The cubic root of 65765009 is about 403.6438079506.

The spelling of 65765009 in words is "sixty-five million, seven hundred sixty-five thousand, nine".