663842251320 has 64 divisors (see below), whose sum is σ = 1996022459520. Its totient is φ = 176624982144.

The previous prime is 663842251217. The next prime is 663842251351. The reversal of 663842251320 is 23152248366.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6190654 + ... + 6296973.

It is an arithmetic number, because the mean of its divisors is an integer number (31187850930).

Almost surely, 2^663842251320 is an apocalyptic number.

663842251320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

663842251320 is an abundant number, since it is smaller than the sum of its proper divisors (1332180208200).

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

663842251320 is a wasteful number, since it uses less digits than its factorization.

663842251320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12488084 (or 12488080 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

Adding to 663842251320 its reverse (23152248366), we get a palindrome (686994499686).

The spelling of 663842251320 in words is "six hundred sixty-three billion, eight hundred forty-two million, two hundred fifty-one thousand, three hundred twenty".