65768009 has 2 divisors, whose sum is σ = 65768010. Its totient is φ = 65768008.

The previous prime is 65767991. The next prime is 65768023. The reversal of 65768009 is 90086756.

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., 48958009 + 16810000 = 6997^2 + 4100^2 .

It is a cyclic number.

It is not a de Polignac number, because 65768009 - 2¹² = 65763913 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (65768039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32884004 + 32884005.

It is an arithmetic number, because the mean of its divisors is an integer number (32884005).

Almost surely, 2^65768009 is an apocalyptic number.

It is an amenable number.

65768009 is a deficient number, since it is larger than the sum of its proper divisors (1).

65768009 is an equidigital number, since it uses as much as digits as its factorization.

65768009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 65768009 is about 8109.7477765958. The cubic root of 65768009 is about 403.6499455255.

The spelling of 65768009 in words is "sixty-five million, seven hundred sixty-eight thousand, nine".