How many chickens in a 4x6 coop?

[PoultryGirly]

How many chickens do you think I could fit comfortably in a 4x6 chicken coop. I also have a 7.5 x 7.5 run. I was thinking 4 hens, a call duck couple, and 2 silkies. Will it be okay??? They might get free range, too.

 

[ScottM]

Still six ?

https://www.backyardchickens.com/t/645076/my-coop