66684044028844 has 48 divisors (see below), whose sum is σ = 127616769665280. Its totient is φ = 30236921042240.

The previous prime is 66684044028773. The next prime is 66684044028853. The reversal of 66684044028844 is 44882044048666.

66684044028844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66684044028844² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 372004182 + ... + 372183394.

It is an arithmetic number, because the mean of its divisors is an integer number (2658682701360).

Almost surely, 2^{66684044028844} is an apocalyptic number.

It is an amenable number.

66684044028844 is a deficient number, since it is larger than the sum of its proper divisors (60932725636436).

66684044028844 is a wasteful number, since it uses less digits than its factorization.

66684044028844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199830 (or 199828 counting only the distinct ones).

The product of its (nonzero) digits is 226492416, while the sum is 64.

The spelling of 66684044028844 in words is "sixty-six trillion, six hundred eighty-four billion, forty-four million, twenty-eight thousand, eight hundred forty-four".