663315547717 has 2 divisors, whose sum is σ = 663315547718. Its totient is φ = 663315547716.

The previous prime is 663315547691. The next prime is 663315547751. The reversal of 663315547717 is 717745513366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370151776801 + 293163770916 = 608401^2 + 541446^2 .

It is a cyclic number.

It is not a de Polignac number, because 663315547717 - 2⁷ = 663315547589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663315547757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331657773858 + 331657773859.

It is an arithmetic number, because the mean of its divisors is an integer number (331657773859).

Almost surely, 2^663315547717 is an apocalyptic number.

It is an amenable number.

663315547717 is a deficient number, since it is larger than the sum of its proper divisors (1).

663315547717 is an equidigital number, since it uses as much as digits as its factorization.

663315547717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11113200, while the sum is 55.

The spelling of 663315547717 in words is "six hundred sixty-three billion, three hundred fifteen million, five hundred forty-seven thousand, seven hundred seventeen".