663511340234240 has 160 divisors (see below), whose sum is σ = 1606857511501440. Its totient is φ = 262738464768000.

The previous prime is 663511340234207. The next prime is 663511340234359. The reversal of 663511340234240 is 42432043115366.

663511340234240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (160).

It is a junction number, because it is equal to n+sod(n) for n = 663511340234191 and 663511340234200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1807409426 + ... + 1807776494.

It is an arithmetic number, because the mean of its divisors is an integer number (10042859446884).

Almost surely, 2^{663511340234240} 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 663511340234240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803428755750720).

663511340234240 is an abundant number, since it is smaller than the sum of its proper divisors (943346171267200).

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

663511340234240 is a wasteful number, since it uses less digits than its factorization.

663511340234240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374184 (or 374168 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 663511340234240 in words is "six hundred sixty-three trillion, five hundred eleven billion, three hundred forty million, two hundred thirty-four thousand, two hundred forty".