320216666717 has 2 divisors, whose sum is σ = 320216666718. Its totient is φ = 320216666716.

The previous prime is 320216666689. The next prime is 320216666719. The reversal of 320216666717 is 717666612023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244610365561 + 75606301156 = 494581^2 + 274966^2 .

It is a cyclic number.

It is not a de Polignac number, because 320216666717 - 2³⁶ = 251497189981 is a prime.

Together with 320216666719, 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 (320216666719) 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, 160108333358 + 160108333359.

It is an arithmetic number, because the mean of its divisors is an integer number (160108333359).

Almost surely, 2^320216666717 is an apocalyptic number.

It is an amenable number.

320216666717 is a deficient number, since it is larger than the sum of its proper divisors (1).

320216666717 is an equidigital number, since it uses as much as digits as its factorization.

320216666717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 320216666717 in words is "three hundred twenty billion, two hundred sixteen million, six hundred sixty-six thousand, seven hundred seventeen".