16684566694 has 16 divisors (see below), whose sum is σ = 26328661200. Its totient is φ = 7918097824.

The previous prime is 16684566641. The next prime is 16684566709. The reversal of 16684566694 is 49666548661.

It is a happy number.

16684566694 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 2434417 + ... + 2441260.

It is an arithmetic number, because the mean of its divisors is an integer number (1645541325).

Almost surely, 2^16684566694 is an apocalyptic number.

16684566694 is a deficient number, since it is larger than the sum of its proper divisors (9644094506).

16684566694 is a wasteful number, since it uses less digits than its factorization.

16684566694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4875767.

The product of its digits is 44789760, while the sum is 61.

The spelling of 16684566694 in words is "sixteen billion, six hundred eighty-four million, five hundred sixty-six thousand, six hundred ninety-four".