663962055197220 has 432 divisors, whose sum is σ = 2238719351581440. Its totient is φ = 159157430654976.

The previous prime is 663962055197219. The next prime is 663962055197317. The reversal of 663962055197220 is 22791550269366.

It is a happy number.

663962055197220 is a `hidden beast` number, since 6 + 6 + 3 + 9 + 6 + 2 + 0 + 551 + 9 + 72 + 2 + 0 = 666.

It is a super-2 number, since 2×663962055197220² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 173539779 + ... + 177324501.

Almost surely, 2^{663962055197220} is an apocalyptic number.

663962055197220 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 663962055197220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119359675790720).

663962055197220 is an abundant number, since it is smaller than the sum of its proper divisors (1574757296384220).

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

663962055197220 is a wasteful number, since it uses less digits than its factorization.

663962055197220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784916 (or 3784898 counting only the distinct ones).

The product of its (nonzero) digits is 73483200, while the sum is 63.

The spelling of 663962055197220 in words is "six hundred sixty-three trillion, nine hundred sixty-two billion, fifty-five million, one hundred ninety-seven thousand, two hundred twenty".