The number 719168 can be written as 7 19 16 8
the number 7 coincides to alphabetic order of letter F plus 1
the number 19 coincides to alphabetic order of letter R plus 1
the number 16 coincides to alphabetic order of letter O plus 1
the number 8 coincides to alphabetic order of letter G plus 1
Then word TRIP
Alphabetic order of letter T is 20
alphabetic order of letter R is 18
alphabetic order of letter I is 9
alphabetic order of letter P is 16
Then the code will be 21191017