663363204217 has 16 divisors (see below), whose sum is σ = 767564485632. Its totient is φ = 561549067200.

The previous prime is 663363204199. The next prime is 663363204239. The reversal of 663363204217 is 712402363366.

It is a cyclic number.

It is not a de Polignac number, because 663363204217 - 2¹⁹ = 663362679929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663363304217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 901033 + ... + 1462390.

It is an arithmetic number, because the mean of its divisors is an integer number (47972780352).

Almost surely, 2^663363204217 is an apocalyptic number.

It is an amenable number.

663363204217 is a deficient number, since it is larger than the sum of its proper divisors (104201281415).

663363204217 is a wasteful number, since it uses less digits than its factorization.

663363204217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363928.

The product of its (nonzero) digits is 653184, while the sum is 43.

The spelling of 663363204217 in words is "six hundred sixty-three billion, three hundred sixty-three million, two hundred four thousand, two hundred seventeen".