Il numero romano MDCLXXXVI nel sistema decimale vale: 1686.
MDCLXXXVI in latino si scrive mille sescenti octoginta sex,
mentre in italiano milleseicentottantasei.
MDCLXVII, MDCLXVIII, MDCLXIX, MDCLXX, MDCLXXI, MDCLXXII, MDCLXXIII, MDCLXXIV, MDCLXXV, MDCLXXVI, MDCLXXVII, MDCLXXVIII, MDCLXXIX, MDCLXXX, MDCLXXXI, MDCLXXXII, MDCLXXXIII, MDCLXXXIV, MDCLXXXV, MDCLXXXVII, MDCLXXXVIII, MDCLXXXIX, MDCXC, MDCXCI, MDCXCII, MDCXCIII, MDCXCIV, MDCXCV, MDCXCVI, MDCXCVII, MDCXCVIII, MDCXCIX, MDCC, MDCCI, MDCCII, MDCCIII, MDCCIV, MDCCV