663133602123217 has 2 divisors, whose sum is σ = 663133602123218. Its totient is φ = 663133602123216.

The previous prime is 663133602123199. The next prime is 663133602123229. The reversal of 663133602123217 is 712321206331366.

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., 611259166006336 + 51874436116881 = 24723656^2 + 7202391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663133602123217 is a prime.

It is not a weakly prime, because it can be changed into another prime (663133602123287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331566801061608 + 331566801061609.

It is an arithmetic number, because the mean of its divisors is an integer number (331566801061609).

Almost surely, 2^{663133602123217} is an apocalyptic number.

It is an amenable number.

663133602123217 is a deficient number, since it is larger than the sum of its proper divisors (1).

663133602123217 is an equidigital number, since it uses as much as digits as its factorization.

663133602123217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 46.

The spelling of 663133602123217 in words is "six hundred sixty-three trillion, one hundred thirty-three billion, six hundred two million, one hundred twenty-three thousand, two hundred seventeen".