663523798368 has 48 divisors (see below), whose sum is σ = 1744094370816. Its totient is φ = 220876897920.

The previous prime is 663523798361. The next prime is 663523798397. The reversal of 663523798368 is 863897325366.

663523798368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 663523798299 and 663523798308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663523798361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4579888 + ... + 4722543.

It is an arithmetic number, because the mean of its divisors is an integer number (36335299392).

Almost surely, 2^663523798368 is an apocalyptic number.

It is an amenable number.

663523798368 is an abundant number, since it is smaller than the sum of its proper divisors (1080570572448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663523798368 is a wasteful number, since it uses less digits than its factorization.

663523798368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9303187 (or 9303179 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 66.

The spelling of 663523798368 in words is "six hundred sixty-three billion, five hundred twenty-three million, seven hundred ninety-eight thousand, three hundred sixty-eight".