2066684680821 has 32 divisors (see below), whose sum is σ = 2813427302400. Its totient is φ = 1349202476160.

The previous prime is 2066684680783. The next prime is 2066684680831. The reversal of 2066684680821 is 1280864866602.

It is not a de Polignac number, because 2066684680821 - 2¹⁰ = 2066684679797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066684680831) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 19308670 + ... + 19415408.

It is an arithmetic number, because the mean of its divisors is an integer number (87919603200).

Almost surely, 2^{2066684680821} is an apocalyptic number.

It is an amenable number.

2066684680821 is a deficient number, since it is larger than the sum of its proper divisors (746742621579).

2066684680821 is a wasteful number, since it uses less digits than its factorization.

2066684680821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107529.

The product of its (nonzero) digits is 10616832, while the sum is 57.

The spelling of 2066684680821 in words is "two trillion, sixty-six billion, six hundred eighty-four million, six hundred eighty thousand, eight hundred twenty-one".