8816666189 has 4 divisors (see below), whose sum is σ = 8820377724. Its totient is φ = 8812954656.

The previous prime is 8816666161. The next prime is 8816666219. The reversal of 8816666189 is 9816666188.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1464975625 + 7351690564 = 38275^2 + 85742^2 .

It is a cyclic number.

It is not a de Polignac number, because 8816666189 - 2⁸ = 8816665933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8816666149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1852202 + ... + 1856955.

It is an arithmetic number, because the mean of its divisors is an integer number (2205094431).

Almost surely, 2^8816666189 is an apocalyptic number.

It is an amenable number.

8816666189 is a deficient number, since it is larger than the sum of its proper divisors (3711535).

8816666189 is a wasteful number, since it uses less digits than its factorization.

8816666189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711534.

The product of its digits is 5971968, while the sum is 59.

The square root of 8816666189 is about 93897.1042631241. The cubic root of 8816666189 is about 2065.8627556103.

Subtracting 8816666189 from its reverse (9816666188), we obtain a palindrome (999999999).

The spelling of 8816666189 in words is "eight billion, eight hundred sixteen million, six hundred sixty-six thousand, one hundred eighty-nine".