65217216677 has 2 divisors, whose sum is σ = 65217216678. Its totient is φ = 65217216676.

The previous prime is 65217216607. The next prime is 65217216721. The reversal of 65217216677 is 77661271256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63883068001 + 1334148676 = 252751^2 + 36526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65217216677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65217216607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32608608338 + 32608608339.

It is an arithmetic number, because the mean of its divisors is an integer number (32608608339).

Almost surely, 2^65217216677 is an apocalyptic number.

It is an amenable number.

65217216677 is a deficient number, since it is larger than the sum of its proper divisors (1).

65217216677 is an equidigital number, since it uses as much as digits as its factorization.

65217216677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1481760, while the sum is 50.

The spelling of 65217216677 in words is "sixty-five billion, two hundred seventeen million, two hundred sixteen thousand, six hundred seventy-seven".