import sys
n = int(input())
for i in range(1, int(n**0.5)+2):
	if n%i == 0 and i != 1 and i != n:
		for j in range(1, int(i**0.5)+2):
			if j != 1 and i%j == 0 and j != i:
				print("YES")
				sys.exit()
print("NO")