63665063765 has 8 divisors (see below), whose sum is σ = 76408363680. Its totient is φ = 50925192912.

The previous prime is 63665063747. The next prime is 63665063779. The reversal of 63665063765 is 56736056636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63665063765 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 816239 + ... + 890828.

It is an arithmetic number, because the mean of its divisors is an integer number (9551045460).

Almost surely, 2^63665063765 is an apocalyptic number.

It is an amenable number.

63665063765 is a deficient number, since it is larger than the sum of its proper divisors (12743299915).

63665063765 is a wasteful number, since it uses less digits than its factorization.

63665063765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714531.

The product of its (nonzero) digits is 12247200, while the sum is 53.

The spelling of 63665063765 in words is "sixty-three billion, six hundred sixty-five million, sixty-three thousand, seven hundred sixty-five".