65973567617 has 2 divisors, whose sum is σ = 65973567618. Its totient is φ = 65973567616.

The previous prime is 65973567613. The next prime is 65973567677. The reversal of 65973567617 is 71676537956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33069058801 + 32904508816 = 181849^2 + 181396^2 .

It is a cyclic number.

It is not a de Polignac number, because 65973567617 - 2² = 65973567613 is a prime.

It is a super-2 number, since 2×65973567617² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65973567617.

It is not a weakly prime, because it can be changed into another prime (65973567613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32986783808 + 32986783809.

It is an arithmetic number, because the mean of its divisors is an integer number (32986783809).

Almost surely, 2^65973567617 is an apocalyptic number.

It is an amenable number.

65973567617 is a deficient number, since it is larger than the sum of its proper divisors (1).

65973567617 is an equidigital number, since it uses as much as digits as its factorization.

65973567617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50009400, while the sum is 62.

The spelling of 65973567617 in words is "sixty-five billion, nine hundred seventy-three million, five hundred sixty-seven thousand, six hundred seventeen".