Is it ok in an informal conversation to say a number digit by digit?

E.g., is it ok to say "two five six kilobytes" instead of "two hundred and fifty-six kilobytes"?

Is it okay in an informal conversation to say a number digit by digit?

For example, is it okay to say "two five six kilobytes" instead of "two hundred and fifty-six kilobytes"?

Is it ok in an informal conversation to say a number value digit by digit?

E.g. "two five six kilobytes" instead of "two hundred and fifty six kilobytes"?

Is it ok in an informal conversation to say a number digit by digit?

E.g., is it ok to say "two five six kilobytes" instead of "two hundred and fifty-six kilobytes"?