Import large model .obj


i am finding the best solution how to load huge model (around 85mil. triangles) to UE.
Everytime UE crashed. I need to save quality, so one chance to load it is split it to smaller components i think, but if i split it, it is possible to merge it together like one model in UE?

The second question is that is possible set up something like in game that i saw only what is in my vision cause of huge model. Think that will be better for this 11gb model. If that is possible can you write where i can find this option?

Thank you so much for every help.