Il numero romano MDCCLXV nel sistema decimale vale: 1765.
MDCCLXV in latino si scrive mille septingenti sexaginta quinque,
mentre in italiano millesettecentosessantacinque.
MDCCXLVI, MDCCXLVII, MDCCXLVIII, MDCCXLIX, MDCCL, MDCCLI, MDCCLII, MDCCLIII, MDCCLIV, MDCCLV, MDCCLVI, MDCCLVII, MDCCLVIII, MDCCLIX, MDCCLX, MDCCLXI, MDCCLXII, MDCCLXIII, MDCCLXIV, MDCCLXVI, MDCCLXVII, MDCCLXVIII, MDCCLXIX, MDCCLXX, MDCCLXXI, MDCCLXXII, MDCCLXXIII, MDCCLXXIV, MDCCLXXV, MDCCLXXVI, MDCCLXXVII, MDCCLXXVIII, MDCCLXXIX, MDCCLXXX, MDCCLXXXI, MDCCLXXXII, MDCCLXXXIII, MDCCLXXXIV