66071180563 has 4 divisors (see below), whose sum is σ = 66092853400. Its totient is φ = 66049507728.

The previous prime is 66071180521. The next prime is 66071180573. The reversal of 66071180563 is 36508117066.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66071180563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66071180573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10831845 + ... + 10837942.

It is an arithmetic number, because the mean of its divisors is an integer number (16523213350).

Almost surely, 2^66071180563 is an apocalyptic number.

66071180563 is a deficient number, since it is larger than the sum of its proper divisors (21672837).

66071180563 is a wasteful number, since it uses less digits than its factorization.

66071180563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21672836.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 66071180563 in words is "sixty-six billion, seventy-one million, one hundred eighty thousand, five hundred sixty-three".