63665481876480 has 704 divisors, whose sum is σ = 248252076806400. Its totient is φ = 15344778608640.

The previous prime is 63665481876473. The next prime is 63665481876523. The reversal of 63665481876480 is 8467818456636.

63665481876480 is a `hidden beast` number, since 6 + 3 + 6 + 6 + 5 + 481 + 8 + 7 + 64 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (704).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 63665481876399 and 63665481876408.

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, 262949716 + ... + 263191724.

Almost surely, 2^{63665481876480} is an apocalyptic number.

63665481876480 is a gapful number since it is divisible by the number (60) 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 63665481876480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124126038403200).

63665481876480 is an abundant number, since it is smaller than the sum of its proper divisors (184586594929920).

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

63665481876480 is a wasteful number, since it uses less digits than its factorization.

63665481876480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242227 (or 242203 counting only the distinct ones).

The product of its (nonzero) digits is 1114767360, while the sum is 72.

The spelling of 63665481876480 in words is "sixty-three trillion, six hundred sixty-five billion, four hundred eighty-one million, eight hundred seventy-six thousand, four hundred eighty".