18484809666 has 16 divisors (see below), whose sum is σ = 37239472224. Its totient is φ = 6116627744.

The previous prime is 18484809593. The next prime is 18484809667. The reversal of 18484809666 is 66690848481.

It is not an unprimeable number, because it can be changed into a prime (18484809667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11242980 + ... + 11244623.

It is an arithmetic number, because the mean of its divisors is an integer number (2327467014).

Almost surely, 2^18484809666 is an apocalyptic number.

18484809666 is an abundant number, since it is smaller than the sum of its proper divisors (18754662558).

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

18484809666 is a wasteful number, since it uses less digits than its factorization.

18484809666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22487745.

The product of its (nonzero) digits is 15925248, while the sum is 60.

The spelling of 18484809666 in words is "eighteen billion, four hundred eighty-four million, eight hundred nine thousand, six hundred sixty-six".