66584584663 has 4 divisors (see below), whose sum is σ = 66585129408. Its totient is φ = 66584039920.

The previous prime is 66584584631. The next prime is 66584584667. The reversal of 66584584663 is 36648548566.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66584584663 - 2⁵ = 66584584631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66584584667) 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, 5403 + ... + 364963.

It is an arithmetic number, because the mean of its divisors is an integer number (16646282352).

Almost surely, 2^66584584663 is an apocalyptic number.

66584584663 is a deficient number, since it is larger than the sum of its proper divisors (544745).

66584584663 is a wasteful number, since it uses less digits than its factorization.

66584584663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544744.

The product of its digits is 99532800, while the sum is 61.

The spelling of 66584584663 in words is "sixty-six billion, five hundred eighty-four million, five hundred eighty-four thousand, six hundred sixty-three".