N=int(input())
c=0
if N!=1:
    if N%2==0:
        c+=1
        if N%4==0: c+=1
    if c<2:
        for j in range(3,int(N**0.5),2):
            if N%j==0: c+=1
            if c>=2: break
print("YES" if c>=2 else "NO")