66564073236 has 12 divisors (see below), whose sum is σ = 155316170912. Its totient is φ = 22188024408.

The previous prime is 66564073211. The next prime is 66564073241. The reversal of 66564073236 is 63237046566.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2773503040 + ... + 2773503063.

Almost surely, 2^66564073236 is an apocalyptic number.

It is an amenable number.

66564073236 is an abundant number, since it is smaller than the sum of its proper divisors (88752097676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66564073236 is a wasteful number, since it uses less digits than its factorization.

66564073236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5547006110 (or 5547006108 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 48.

The spelling of 66564073236 in words is "sixty-six billion, five hundred sixty-four million, seventy-three thousand, two hundred thirty-six".