663728676098399 has 4 divisors (see below), whose sum is σ = 686615871825960. Its totient is φ = 640841480370840.

The previous prime is 663728676098381. The next prime is 663728676098417. The reversal of 663728676098399 is 993890676827366.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (663728676098381) and next prime (663728676098417).

It is a cyclic number.

It is not a de Polignac number, because 663728676098399 - 2²⁴ = 663728659321183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663728676098339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11443597863737 + ... + 11443597863794.

It is an arithmetic number, because the mean of its divisors is an integer number (171653967956490).

Almost surely, 2^{663728676098399} is an apocalyptic number.

663728676098399 is a deficient number, since it is larger than the sum of its proper divisors (22887195727561).

663728676098399 is a wasteful number, since it uses less digits than its factorization.

663728676098399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22887195727560.

The product of its (nonzero) digits is 53331167232, while the sum is 89.

The spelling of 663728676098399 in words is "six hundred sixty-three trillion, seven hundred twenty-eight billion, six hundred seventy-six million, ninety-eight thousand, three hundred ninety-nine".