663728659321183 has 2 divisors, whose sum is σ = 663728659321184. Its totient is φ = 663728659321182.

The previous prime is 663728659321177. The next prime is 663728659321199. The reversal of 663728659321183 is 381123956827366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663728659321183 - 2²⁵ = 663728625766751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663728659328183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331864329660591 + 331864329660592.

It is an arithmetic number, because the mean of its divisors is an integer number (331864329660592).

Almost surely, 2^{663728659321183} is an apocalyptic number.

663728659321183 is a deficient number, since it is larger than the sum of its proper divisors (1).

663728659321183 is an equidigital number, since it uses as much as digits as its factorization.

663728659321183 is an evil number, because the sum of its binary digits is even.

The product of its digits is 470292480, while the sum is 70.

The spelling of 663728659321183 in words is "six hundred sixty-three trillion, seven hundred twenty-eight billion, six hundred fifty-nine million, three hundred twenty-one thousand, one hundred eighty-three".