Il numero romano MCLXVI nel sistema decimale vale: 1166.
MCLXVI in latino si scrive mille centum sexaginta sex,
mentre in italiano millecentosessantasei.
MCXLVII, MCXLVIII, MCXLIX, MCL, MCLI, MCLII, MCLIII, MCLIV, MCLV, MCLVI, MCLVII, MCLVIII, MCLIX, MCLX, MCLXI, MCLXII, MCLXIII, MCLXIV, MCLXV, MCLXVII, MCLXVIII, MCLXIX, MCLXX, MCLXXI, MCLXXII, MCLXXIII, MCLXXIV, MCLXXV, MCLXXVI, MCLXXVII, MCLXXVIII, MCLXXIX, MCLXXX, MCLXXXI, MCLXXXII, MCLXXXIII, MCLXXXIV, MCLXXXV