def sosuiya(N):
    if N == 1:
        return 'NO'
    for n in range(2, N + 1):
        if N % n == 0:
            if N > n:
                M = N // n
                for m in range(2, M + 1):
                    if M % m == 0:
                        if M > m:
                            return 'YES'
                        elif M == m:
                            return 'NO'
            elif N == n:
                return 'NO'

def main():
    N = int(input())
    print(sosuiya(N))

if __name__ == '__main__':
    main()