663539017653702 has 96 divisors (see below), whose sum is σ = 1571823202959360. Its totient is φ = 201392147162880.

The previous prime is 663539017653691. The next prime is 663539017653749. The reversal of 663539017653702 is 207356710935366.

663539017653702 is a `hidden beast` number, since 6 + 6 + 3 + 5 + 3 + 90 + 1 + 7 + 6 + 537 + 0 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 663539017653702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20183163 + ... + 41646585.

It is an arithmetic number, because the mean of its divisors is an integer number (16373158364160).

Almost surely, 2^{663539017653702} is an apocalyptic number.

663539017653702 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 663539017653702, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (785911601479680).

663539017653702 is an abundant number, since it is smaller than the sum of its proper divisors (908284185305658).

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

663539017653702 is a wasteful number, since it uses less digits than its factorization.

663539017653702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21466738 (or 21466735 counting only the distinct ones).

The product of its (nonzero) digits is 128595600, while the sum is 63.

The spelling of 663539017653702 in words is "six hundred sixty-three trillion, five hundred thirty-nine billion, seventeen million, six hundred fifty-three thousand, seven hundred two".