66233727686 has 16 divisors (see below), whose sum is σ = 115468001280. Its totient is φ = 27904766280.

The previous prime is 66233727683. The next prime is 66233727697. The reversal of 66233727686 is 68672733266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66233727683) 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 7 ways as a sum of consecutive naturals, for example, 40092230 + ... + 40093881.

It is an arithmetic number, because the mean of its divisors is an integer number (7216750080).

Almost surely, 2^66233727686 is an apocalyptic number.

66233727686 is a deficient number, since it is larger than the sum of its proper divisors (49234273594).

66233727686 is a wasteful number, since it uses less digits than its factorization.

66233727686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80186179.

The product of its digits is 18289152, while the sum is 56.

The spelling of 66233727686 in words is "sixty-six billion, two hundred thirty-three million, seven hundred twenty-seven thousand, six hundred eighty-six".