fun main(arr:Array<String>) {
    val num = readLine()!!.toLong()
    val ans = if(canUse(num)) "YES" else "NO"
    println(ans)
}

fun canUse(num:Long):Boolean {
    var cur = 2.toLong()
    var target = num;
    val primeDivided = mutableMapOf<Long, Int>()
    while (target > 1.toLong() && cur < target) {
        var cnt = 0
        while (target % cur == 0.toLong()) {
            cnt++;
            target = target / cur
        }
        if(cnt > 0) {
            primeDivided[cur] = cnt
        }
        cur++
    }
    return primeDivided.values.sum() > 2
}