67120565717 has 2 divisors, whose sum is σ = 67120565718. Its totient is φ = 67120565716.

The previous prime is 67120565689. The next prime is 67120565719. The reversal of 67120565717 is 71756502176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47239283716 + 19881282001 = 217346^2 + 141001^2 .

It is a cyclic number.

It is not a de Polignac number, because 67120565717 - 2²⁰ = 67119517141 is a prime.

Together with 67120565719, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67120565719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33560282858 + 33560282859.

It is an arithmetic number, because the mean of its divisors is an integer number (33560282859).

Almost surely, 2^67120565717 is an apocalyptic number.

It is an amenable number.

67120565717 is a deficient number, since it is larger than the sum of its proper divisors (1).

67120565717 is an equidigital number, since it uses as much as digits as its factorization.

67120565717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 617400, while the sum is 47.

The spelling of 67120565717 in words is "sixty-seven billion, one hundred twenty million, five hundred sixty-five thousand, seven hundred seventeen".