No No No....there ain't any left hand threads in there. Don't try that.....!
Very tight however, Clymer recommends heating it up first but they don't give a spec on temperature required. I guess they are assuming there is no Loctite in there BUT, their pics show Loctite or similar on the threads.
First clean the exterior threads you can see, you don't want any crud in there that could bind them fine threads as you remove the locknut.
Then you can lube a bit and then apply some heat. Just guessing here but 150-180 F should do it. But all depends on the type of Loctite used, if any.The heat will help the lube getting in the threads and....melt the Loctite "if any" in there.
I use the proper socket with an 1/2"breaker's bar and an old BMW fork tube over that for leverage. It should go.....Craaaaak and release.If not....start again, more heat.
You are looking at torques from 160 Nm to 200 Nm depending on the part, so lots of force required.