16640773666 has 16 divisors (see below), whose sum is σ = 27251238240. Its totient is φ = 7558187680.

The previous prime is 16640773657. The next prime is 16640773687. The reversal of 16640773666 is 66637704661.

16640773666 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260611 + ... + 318118.

It is an arithmetic number, because the mean of its divisors is an integer number (1703202390).

Almost surely, 2^16640773666 is an apocalyptic number.

16640773666 is a deficient number, since it is larger than the sum of its proper divisors (10610464574).

16640773666 is a wasteful number, since it uses less digits than its factorization.

16640773666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580049.

The product of its (nonzero) digits is 4572288, while the sum is 52.

The spelling of 16640773666 in words is "sixteen billion, six hundred forty million, seven hundred seventy-three thousand, six hundred sixty-six".