A mobius strip has only two sides. As for the general name for such a class of shapes there is none.
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The name for a 57 sided shape is derived by combining the name for a 50 sided shape with the name for a 7 sided shape. A 57 sided shape is called a pentacontaheptagon.
icosikaidigon is a 22 sided shape
A hexahedron is the name for a 6 sided 3D shape.
A 14 sided shape is called a Tetradecagon.
A million sided shape is called a Megagon.