Il numero romano CLXX nel sistema decimale vale: 170.
CLXX in latino si scrive centum septuaginta,
mentre in italiano centosettanta.
CLI, CLII, CLIII, CLIV, CLV, CLVI, CLVII, CLVIII, CLIX, CLX, CLXI, CLXII, CLXIII, CLXIV, CLXV, CLXVI, CLXVII, CLXVIII, CLXIX, CLXXI, CLXXII, CLXXIII, CLXXIV, CLXXV, CLXXVI, CLXXVII, CLXXVIII, CLXXIX, CLXXX, CLXXXI, CLXXXII, CLXXXIII, CLXXXIV, CLXXXV, CLXXXVI, CLXXXVII, CLXXXVIII, CLXXXIX