func main()
	var n: int :: cui@inputInt()
	var a: []int :: math@primeFactors(n)
	var ans: bool :: false
	for i(0, ^a - 1)
		if(a[i] > 2)
			do ans :: true
		end if
	end for
	
	do cui@print(ans ?("YES\n", "NO\n"))
end func