663798648240 has 2240 divisors, whose sum is σ = 3114850636800. Its totient is φ = 127543320576.

The previous prime is 663798648217. The next prime is 663798648283. The reversal of 663798648240 is 42846897366.

663798648240 is a `hidden beast` number, since 6 + 6 + 3 + 79 + 86 + 482 + 4 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 447 ways as a sum of consecutive naturals, for example, 2924223007 + ... + 2924223233.

It is an arithmetic number, because the mean of its divisors is an integer number (1390558320).

Almost surely, 2^663798648240 is an apocalyptic number.

663798648240 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 663798648240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1557425318400).

663798648240 is an abundant number, since it is smaller than the sum of its proper divisors (2451051988560).

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

663798648240 is a wasteful number, since it uses less digits than its factorization.

663798648240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 63.

The spelling of 663798648240 in words is "six hundred sixty-three billion, seven hundred ninety-eight million, six hundred forty-eight thousand, two hundred forty".