66503430566 has 8 divisors (see below), whose sum is σ = 99765919704. Its totient is φ = 33248124000.

The previous prime is 66503430563. The next prime is 66503430571.

66503430566 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66503430563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1772435 + ... + 1809566.

It is an arithmetic number, because the mean of its divisors is an integer number (12470739963).

Almost surely, 2^66503430566 is an apocalyptic number.

66503430566 is a deficient number, since it is larger than the sum of its proper divisors (33262489138).

66503430566 is a wasteful number, since it uses less digits than its factorization.

66503430566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591286.

The product of its (nonzero) digits is 1166400, while the sum is 44.

The spelling of 66503430566 in words is "sixty-six billion, five hundred three million, four hundred thirty thousand, five hundred sixty-six".