6666173 has 2 divisors, whose sum is σ = 6666174. Its totient is φ = 6666172.

The previous prime is 6666167. The next prime is 6666203. The reversal of 6666173 is 3716666.

It is a happy number.

6666173 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4481689 + 2184484 = 2117^2 + 1478^2 .

6666173 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 6666173 - 2⁴ = 6666157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6666133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333086 + 3333087.

It is an arithmetic number, because the mean of its divisors is an integer number (3333087).

Almost surely, 2^6666173 is an apocalyptic number.

It is an amenable number.

6666173 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666173 is an equidigital number, since it uses as much as digits as its factorization.

6666173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 35.

The square root of 6666173 is about 2581.8932975629. The cubic root of 6666173 is about 188.2025600803.

The spelling of 6666173 in words is "six million, six hundred sixty-six thousand, one hundred seventy-three".