66382446563 has 4 divisors (see below), whose sum is σ = 69876259560. Its totient is φ = 62888633568.

The previous prime is 66382446553. The next prime is 66382446577. The reversal of 66382446563 is 36564428366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66382446563 - 2¹⁰ = 66382445539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66382446553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1746906470 + ... + 1746906507.

It is an arithmetic number, because the mean of its divisors is an integer number (17469064890).

Almost surely, 2^66382446563 is an apocalyptic number.

66382446563 is a deficient number, since it is larger than the sum of its proper divisors (3493812997).

66382446563 is a wasteful number, since it uses less digits than its factorization.

66382446563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3493812996.

The product of its digits is 14929920, while the sum is 53.

The spelling of 66382446563 in words is "sixty-six billion, three hundred eighty-two million, four hundred forty-six thousand, five hundred sixty-three".