63660960720 has 480 divisors, whose sum is σ = 268510492800. Its totient is φ = 13784795136.

The previous prime is 63660960709. The next prime is 63660960721. The reversal of 63660960720 is 2706906636.

63660960720 is a `hidden beast` number, since 6 + 36 + 6 + 0 + 9 + 607 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63660960721) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1995132 + ... + 2026788.

It is an arithmetic number, because the mean of its divisors is an integer number (559396860).

Almost surely, 2^63660960720 is an apocalyptic number.

63660960720 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 63660960720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134255246400).

63660960720 is an abundant number, since it is smaller than the sum of its proper divisors (204849532080).

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

63660960720 is a wasteful number, since it uses less digits than its factorization.

63660960720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31712 (or 31693 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The spelling of 63660960720 in words is "sixty-three billion, six hundred sixty million, nine hundred sixty thousand, seven hundred twenty".