Il numero romano MDCCLXVI nel sistema decimale vale: 1766.
MDCCLXVI in latino si scrive mille septingenti sexaginta sex,
mentre in italiano millesettecentosessantasei.
MDCCXLVII, MDCCXLVIII, MDCCXLIX, MDCCL, MDCCLI, MDCCLII, MDCCLIII, MDCCLIV, MDCCLV, MDCCLVI, MDCCLVII, MDCCLVIII, MDCCLIX, MDCCLX, MDCCLXI, MDCCLXII, MDCCLXIII, MDCCLXIV, MDCCLXV, MDCCLXVII, MDCCLXVIII, MDCCLXIX, MDCCLXX, MDCCLXXI, MDCCLXXII, MDCCLXXIII, MDCCLXXIV, MDCCLXXV, MDCCLXXVI, MDCCLXXVII, MDCCLXXVIII, MDCCLXXIX, MDCCLXXX, MDCCLXXXI, MDCCLXXXII, MDCCLXXXIII, MDCCLXXXIV, MDCCLXXXV