665300617 has 2 divisors, whose sum is σ = 665300618. Its totient is φ = 665300616.

The previous prime is 665300533. The next prime is 665300659. The reversal of 665300617 is 716003566.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 658230336 + 7070281 = 25656^2 + 2659^2 .

It is a cyclic number.

It is not a de Polignac number, because 665300617 - 2¹⁵ = 665267849 is a prime.

It is not a weakly prime, because it can be changed into another prime (665300677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332650308 + 332650309.

It is an arithmetic number, because the mean of its divisors is an integer number (332650309).

Almost surely, 2^665300617 is an apocalyptic number.

It is an amenable number.

665300617 is a deficient number, since it is larger than the sum of its proper divisors (1).

665300617 is an equidigital number, since it uses as much as digits as its factorization.

665300617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 665300617 is about 25793.4219715027. The cubic root of 665300617 is about 872.9833795751.

The spelling of 665300617 in words is "six hundred sixty-five million, three hundred thousand, six hundred seventeen".