Exercise $1\mathrm{.}4$ Time conversion

Write a program to ask the user to input a number $($in seconds$).$ Convert it into the format hour, minute, second, then print the result separated by $$:$.$ For example, if the input is $3666,$ your output should be $1$ : $1$ : $6($as it is $1$ hour $1$ minute and $6$ seconds$).$