665411797 has 2 divisors, whose sum is σ = 665411798. Its totient is φ = 665411796.

The previous prime is 665411783. The next prime is 665411809. The reversal of 665411797 is 797114566.

665411797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 650964196 + 14447601 = 25514^2 + 3801^2 .

It is a cyclic number.

It is not a de Polignac number, because 665411797 - 2¹¹ = 665409749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665411777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332705898 + 332705899.

It is an arithmetic number, because the mean of its divisors is an integer number (332705899).

Almost surely, 2^665411797 is an apocalyptic number.

It is an amenable number.

665411797 is a deficient number, since it is larger than the sum of its proper divisors (1).

665411797 is an equidigital number, since it uses as much as digits as its factorization.

665411797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 46.

The square root of 665411797 is about 25795.5770821279. The cubic root of 665411797 is about 873.0320056566.

The spelling of 665411797 in words is "six hundred sixty-five million, four hundred eleven thousand, seven hundred ninety-seven".