Il numero romano MMCLVI nel sistema decimale vale: 2156.
MMCLVI in latino si scrive duo milia centum quinquaginta sex,
mentre in italiano duemilacentocinquantasei.
MMCXXXVII, MMCXXXVIII, MMCXXXIX, MMCXL, MMCXLI, MMCXLII, MMCXLIII, MMCXLIV, MMCXLV, MMCXLVI, MMCXLVII, MMCXLVIII, MMCXLIX, MMCL, MMCLI, MMCLII, MMCLIII, MMCLIV, MMCLV, MMCLVII, MMCLVIII, MMCLIX, MMCLX, MMCLXI, MMCLXII, MMCLXIII, MMCLXIV, MMCLXV, MMCLXVI, MMCLXVII, MMCLXVIII, MMCLXIX, MMCLXX, MMCLXXI, MMCLXXII, MMCLXXIII, MMCLXXIV, MMCLXXV