66323343566 has 16 divisors (see below), whose sum is σ = 101927820960. Its totient is φ = 32347662720.

The previous prime is 66323343557. The next prime is 66323343587. The reversal of 66323343566 is 66534332366.

It is a self number, because there is not a number n which added to its sum of digits gives 66323343566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477095 + ... + 600221.

It is an arithmetic number, because the mean of its divisors is an integer number (6370488810).

Almost surely, 2^66323343566 is an apocalyptic number.

66323343566 is a deficient number, since it is larger than the sum of its proper divisors (35604477394).

66323343566 is a wasteful number, since it uses less digits than its factorization.

66323343566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129739.

The product of its digits is 4199040, while the sum is 47.

The spelling of 66323343566 in words is "sixty-six billion, three hundred twenty-three million, three hundred forty-three thousand, five hundred sixty-six".