1.67828640634e+20 feet equals 51,154,169,665,243,208,248,924,831,744 nanometers.
Convert 1.67828640634e+20 feet into meters, kilometers, decimeters, centimeters, milimeters, micrometers, picometers, inches, yards, miles, hands, lightyears, astronomical units, parsecs, etc...
Convert 5.1154169665243E+28 nanometers into meters, kilometers, decimeters, centimeters, milimeters, micrometers, picometers, inches, yards, miles, hands, lightyears, astronomical units, parsecs, etc...