6666173889 has 8 divisors (see below), whose sum is σ = 9077343360. Its totient is φ = 4349560176.

The previous prime is 6666173863. The next prime is 6666173953. The reversal of 6666173889 is 9883716666.

6666173889 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6666173889 - 2¹² = 6666169793 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6666173849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23638774 + ... + 23639055.

It is an arithmetic number, because the mean of its divisors is an integer number (1134667920).

Almost surely, 2^6666173889 is an apocalyptic number.

It is an amenable number.

6666173889 is a deficient number, since it is larger than the sum of its proper divisors (2411169471).

6666173889 is a wasteful number, since it uses less digits than its factorization.

6666173889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47277879.

The product of its digits is 15676416, while the sum is 60.

The square root of 6666173889 is about 81646.6404024073. The cubic root of 6666173889 is about 1882.0256844656.

The spelling of 6666173889 in words is "six billion, six hundred sixty-six million, one hundred seventy-three thousand, eight hundred eighty-nine".