how to implement a table that has some cells with long texts?

I don't exactly know how you want your text to be broken into several lines, here are two options I came up with:

Option 1

hspace{0pt} with tabularx

As you can see, it is very picky about where it breaks the words. If the table gets too narrow, the text starts overflowing.

Option 2

collectcellseqsplit...endcollectcell with tabularx,seqsplit and collcell

With this, the text can break anywhere. BUT it looks like it deletes spacing between words. If you want this option and need spaces between your words, you can put the spaces inside curly brackets { } and they won't be broken/deleted.

Code

documentclass[]{article}

usepackage[margin=1cm]{geometry} % Changing page margin
usepackage{array}
usepackage{tabularx}
usepackage{seqsplit}
usepackage{collcell}

% >{hsize=.5hsize} Insert this into the column type definition to change column width (produces some glitches if used incorrectly)
%newcolumntype{s}{>{hspace{0pt}raggedrightarraybackslash}X} % OPTION 1 "Human"-like breaking
newcolumntype{s}{>{collectcellseqsplit}>{raggedrightarraybackslash}X<{endcollectcell}} % OPTION 2 Breaks everything

renewcommand{tabularxcolumn}[1]{m{#1}} % Vertical centering in cells
renewcommand{seqinsert}{ifmmodeallowbreakelse-fi} % Inserts hyphens at the breakpoints

begin{document}

begin{tabularx}{250pt}{|s|s|s|s|s|} % 6 columns, table width = 250pt
hline
Numbers & Long Strings & Numbers & Long Strings & Numbers 
hline
1000000000{ }Big{ }Number & VeryVeryLongString with Number 524 & 1000000000 Big Number & VeryVeryLongString with Number 524 & 1000000000 Big Number 
hline
end{tabularx}

end{document}

BONUS

If you want to center text within the cells, just change raggedright to centering inside the column type declaration. If you need columns with different styles, just copy the already existing declaration, change what you need, give it a different letter and use it in the table.