66813334068 has 36 divisors (see below), whose sum is σ = 168812393568. Its totient is φ = 20557948320.

The previous prime is 66813334051. The next prime is 66813334129. The reversal of 66813334068 is 86043331866.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16470688 + ... + 16474743.

Almost surely, 2^66813334068 is an apocalyptic number.

It is an amenable number.

66813334068 is an abundant number, since it is smaller than the sum of its proper divisors (101999059500).

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

66813334068 is a wasteful number, since it uses less digits than its factorization.

66813334068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32945464 (or 32945449 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 48.

The spelling of 66813334068 in words is "sixty-six billion, eight hundred thirteen million, three hundred thirty-four thousand, sixty-eight".