663284638771 has 2 divisors, whose sum is σ = 663284638772. Its totient is φ = 663284638770.

The previous prime is 663284638663. The next prime is 663284638937. The reversal of 663284638771 is 177836482366.

663284638771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663284638771 is a prime.

It is not a weakly prime, because it can be changed into another prime (663284648771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331642319385 + 331642319386.

It is an arithmetic number, because the mean of its divisors is an integer number (331642319386).

Almost surely, 2^663284638771 is an apocalyptic number.

663284638771 is a deficient number, since it is larger than the sum of its proper divisors (1).

663284638771 is an equidigital number, since it uses as much as digits as its factorization.

663284638771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48771072, while the sum is 61.

The spelling of 663284638771 in words is "six hundred sixty-three billion, two hundred eighty-four million, six hundred thirty-eight thousand, seven hundred seventy-one".