Hi!
I dont really like betting this flop vs 2 oponents.You are almost never gonna make them all fold and there are only 2x6 good cards for you on the turn...so your flopbet will not really do much good for you. If you also take a look at your equity here you can realise its pretty bad already so just c/f is my preffered option and hope they maybe checkthrough... in this case on good(aka blank) turncards we will be betting.
As played turncard is superbad so c/f is default play.
River is still c/f for me.betting now makes no sense,you clearly dont have value since almost zero worse hands will call you and 66 at the same time is too strong to make anything better to fold once you checked turn.
Question is only whether to c/c or c/f but 1:5 is not enough for me to basically hunt somewhat unlikely FD(why isnt it bluffing turn then?) or Ahigh(which is not likely to call flop in the first place).
On the other hand his turn check is totally like some weak made hand like 9x,Tx,even Jx or Qx from a passive player...this represent a huge part of this range...so c/f and hope he checks behind with worse hand
6 
T 
9 
