63665340620752 has 80 divisors (see below), whose sum is σ = 136242394928640. Its totient is φ = 28633148697600.

The previous prime is 63665340620681. The next prime is 63665340620887. The reversal of 63665340620752 is 25702604356636.

It is a junction number, because it is equal to n+sod(n) for n = 63665340620693 and 63665340620702.

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, 2705977 + ... + 11604007.

It is an arithmetic number, because the mean of its divisors is an integer number (1703029936608).

Almost surely, 2^{63665340620752} 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 63665340620752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68121197464320).

63665340620752 is an abundant number, since it is smaller than the sum of its proper divisors (72577054307888).

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

63665340620752 is a wasteful number, since it uses less digits than its factorization.

63665340620752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8898932 (or 8898926 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 55.

The spelling of 63665340620752 in words is "sixty-three trillion, six hundred sixty-five billion, three hundred forty million, six hundred twenty thousand, seven hundred fifty-two".