663853768704 has 336 divisors, whose sum is σ = 2236449883200. Its totient is φ = 189665280000.

The previous prime is 663853768693. The next prime is 663853768723. The reversal of 663853768704 is 407867358366.

663853768704 is a `hidden beast` number, since 6 + 6 + 38 + 537 + 68 + 7 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25275579 + ... + 25301829.

Almost surely, 2^663853768704 is an apocalyptic number.

663853768704 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663853768704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1118224941600).

663853768704 is an abundant number, since it is smaller than the sum of its proper divisors (1572596114496).

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

663853768704 is an equidigital number, since it uses as much as digits as its factorization.

663853768704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26304 (or 26263 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 63.

The spelling of 663853768704 in words is "six hundred sixty-three billion, eight hundred fifty-three million, seven hundred sixty-eight thousand, seven hundred four".