65816719 has 2 divisors, whose sum is σ = 65816720. Its totient is φ = 65816718.

The previous prime is 65816693. The next prime is 65816749. The reversal of 65816719 is 91761856.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65816719 - 2⁵ = 65816687 is a prime.

It is a super-2 number, since 2×65816719² = 8663680999849922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65816749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32908359 + 32908360.

It is an arithmetic number, because the mean of its divisors is an integer number (32908360).

Almost surely, 2^65816719 is an apocalyptic number.

65816719 is a deficient number, since it is larger than the sum of its proper divisors (1).

65816719 is an equidigital number, since it uses as much as digits as its factorization.

65816719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 43.

The square root of 65816719 is about 8112.7503967520. The cubic root of 65816719 is about 403.7495731767.

The spelling of 65816719 in words is "sixty-five million, eight hundred sixteen thousand, seven hundred nineteen".