The atmospheric pressure at the top of Everest is about 4.89 pounds per square inch (psi). On Mars’ surface it’s 0.088 psi. Good luck with the helicopter’s performance for any length of time.
The wikipedia article says that flight duration is max three minutes for the Mars ‘copter. I knew the atmosphere on Mars thin, but I didn’t know how thin! If Mars gravity is roughly .4 of earth, then the vehicle weighs about 1.6 pounds. I hope there is enough atmosphere for those blades to catch and carry!