Write a python program to ask the user to enter an integer positive or negative number from the keyboard if the entered number is $0$ the program will ask the user to enter another number again.

The program will find and print out the following:

$1-$ number of digits of the number

$2-$ sum of even digits of the number

$3-$ product of odd digits of the number

$4-$ The reverse of the number

$5-$ The largest digit

$6-$ the smallest digit