320216666719 has 2 divisors, whose sum is σ = 320216666720. Its totient is φ = 320216666718.

The previous prime is 320216666717. The next prime is 320216666773. The reversal of 320216666719 is 917666612023.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320216666719 - 2¹ = 320216666717 is a prime.

It is a super-2 number, since 2×320216666719² (a number of 24 digits) contains 22 as substring.

Together with 320216666717, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320216666717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160108333359 + 160108333360.

It is an arithmetic number, because the mean of its divisors is an integer number (160108333360).

Almost surely, 2^320216666719 is an apocalyptic number.

320216666719 is a deficient number, since it is larger than the sum of its proper divisors (1).

320216666719 is an equidigital number, since it uses as much as digits as its factorization.

320216666719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 320216666719 in words is "three hundred twenty billion, two hundred sixteen million, six hundred sixty-six thousand, seven hundred nineteen".