N = [int(n) for n in input()]
S = set(N)
if len(S) == 1:
    print(str(S.pop()) * len(N))
    exit()

L = [0] * 10
ans = 1
for i in [1, 3, 5, 7, 9]:
    if i in S:
        break
else:
    L[2] = 1

if sum(N) % 3 == 0:
    L[3] = 1
if sum(N) % 9 == 0:
    L[3] = 0
    L[9] = 1

for i in [1, 2, 3, 5, 6, 7, 9]:
    if i in S:
        break
else:
    L[2] = 0
    L[4] = 1

for i in [1, 2, 3, 4, 6, 7, 8, 9]:
    if i in S:
        break
else:
    L[5] = 1

for i in [1, 2, 3, 4, 5, 6, 8, 9]:
    if i in S:
        break
else:
    L[7] = 1

for i in [1, 2, 3, 4, 5, 6, 7, 9]:
    if i in S:
        break
else:
    L[2] = 0
    L[4] = 0
    L[8] = 1

for i in range(10):
    if L[i]:
        ans *= i

print(ans)