66385562858 has 16 divisors (see below), whose sum is σ = 99797083776. Its totient is φ = 33119918880.

The previous prime is 66385562843. The next prime is 66385562909. The reversal of 66385562858 is 85826558366.

It is a self number, because there is not a number n which added to its sum of digits gives 66385562858.

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, 2996510 + ... + 3018582.

It is an arithmetic number, because the mean of its divisors is an integer number (6237317736).

Almost surely, 2^66385562858 is an apocalyptic number.

66385562858 is a deficient number, since it is larger than the sum of its proper divisors (33411520918).

66385562858 is a wasteful number, since it uses less digits than its factorization.

66385562858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25309.

The product of its digits is 82944000, while the sum is 62.

The spelling of 66385562858 in words is "sixty-six billion, three hundred eighty-five million, five hundred sixty-two thousand, eight hundred fifty-eight".