If that was the case, then no B-52 would ever have been able to lift off the ground with all eight engines at max power.
The glide ratio (lift to drag ratio - L/D) is likely to be roughly 20:1 - a little better than most airliners due to the slimmer fuselage, the quite low wing loading and rather small (and therefore low drag) nacelles. But it will be rather different with engines at flight idle or dead engines windmilling.
At FL450 a B-52H cruises beautifully with all engines running. At that altitude max power will be reduced by some 80% due to the thin air - 3-4,000 lbs instead of 17,000 per engine. From that we can assume that at sea level it will fly straight and level even at max weight on two symmetric engines, at least with the other six at idle.
But whether we can choose two symmetric engines and still have sufficient hydraulic and electric power available for controlled flight, that's another story.
As described in earliers posts, the B-52 is a terrible thing with asymmetric thrust. It could never be certified to carry pax with that unusual configuration. It is simply not safe enough with asymmetric thrust. But the unusual configuration saves a lot of weight. And all crew members enjoy the comfort of an ejection seat. Makes it able to make moon craters further away from home.
Assuming MTOW = 488,000 lbs and L/D = 20:1, then thrust needed is 488,000 divided by 20 = 24,400 lbs. So yes, it will theoretically fly on two engines doing 17,000 each, until you lower flaps and landing gear.
Remember, a twin airliner shall do a lot more than just fly on one engine. It must take off at MTOW after engine shut down at V1 and climb out at 2.75 degrees with flaps and slats extended and gear down. It must do so even at some airport elevation and on quite hot days when it shall not most of the time be operated with severe weight restrictions. That also means that any twin airliner must be able to cruise at sea level in clean configuration on one third or one fourth of max power on one engine only. At MTOW. And much less than that without payload and with low fuel load.
But lose an engine at high altitude, then you come down!