66840800186 has 16 divisors (see below), whose sum is σ = 100425153024. Its totient is φ = 33365795424.

The previous prime is 66840800177. The next prime is 66840800189. The reversal of 66840800186 is 68100804866.

66840800186 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66840800186.

It is not an unprimeable number, because it can be changed into a prime (66840800189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3243431 + ... + 3263973.

It is an arithmetic number, because the mean of its divisors is an integer number (6276572064).

Almost surely, 2^66840800186 is an apocalyptic number.

66840800186 is a deficient number, since it is larger than the sum of its proper divisors (33584352838).

66840800186 is a wasteful number, since it uses less digits than its factorization.

66840800186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23125.

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 66840800186 in words is "sixty-six billion, eight hundred forty million, eight hundred thousand, one hundred eighty-six".