Yes. A high number can be achieved in two ways, possibly by combining them:
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The “usual” way, being a high lift-to-drag ratio
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A very high lift coefficient as for Flettner (until 8 at a spin ratio of 3 or 4) or Sharp (until 3) rotors, or as for High lift coefficient and biplane kite, the last being able to be combined with the previous (high lift-to-drag ratio).