663676256320 has 448 divisors, whose sum is σ = 2077598730240. Its totient is φ = 195637248000.

The previous prime is 663676256303. The next prime is 663676256333. The reversal of 663676256320 is 23652676366.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 457391595 + ... + 457393045.

Almost surely, 2^663676256320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663676256320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1038799365120).

663676256320 is an abundant number, since it is smaller than the sum of its proper divisors (1413922473920).

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

663676256320 is a wasteful number, since it uses less digits than its factorization.

663676256320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482 (or 2472 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 52.

The spelling of 663676256320 in words is "six hundred sixty-three billion, six hundred seventy-six million, two hundred fifty-six thousand, three hundred twenty".