Il numero romano MDLXVI nel sistema decimale vale: 1566.
MDLXVI in latino si scrive mille quingenti sexaginta sex,
mentre in italiano millecinquecentosessantasei.
MDXLVII, MDXLVIII, MDXLIX, MDL, MDLI, MDLII, MDLIII, MDLIV, MDLV, MDLVI, MDLVII, MDLVIII, MDLIX, MDLX, MDLXI, MDLXII, MDLXIII, MDLXIV, MDLXV, MDLXVII, MDLXVIII, MDLXIX, MDLXX, MDLXXI, MDLXXII, MDLXXIII, MDLXXIV, MDLXXV, MDLXXVI, MDLXXVII, MDLXXVIII, MDLXXIX, MDLXXX, MDLXXXI, MDLXXXII, MDLXXXIII, MDLXXXIV, MDLXXXV