663329931247 has 2 divisors, whose sum is σ = 663329931248. Its totient is φ = 663329931246.

The previous prime is 663329931241. The next prime is 663329931259. The reversal of 663329931247 is 742139923366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663329931247 - 2¹⁵ = 663329898479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663329931241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331664965623 + 331664965624.

It is an arithmetic number, because the mean of its divisors is an integer number (331664965624).

Almost surely, 2^663329931247 is an apocalyptic number.

663329931247 is a deficient number, since it is larger than the sum of its proper divisors (1).

663329931247 is an equidigital number, since it uses as much as digits as its factorization.

663329931247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 55.

The spelling of 663329931247 in words is "six hundred sixty-three billion, three hundred twenty-nine million, nine hundred thirty-one thousand, two hundred forty-seven".