Can you Guess the Secret Phone Number ?

I have a secret phone number and you can only guess it if you answer this riddle...

I met a man going to USA.
He had 10 wives, each wife had 5 sons,
and each son had 8 cats, and each cat had 6 kittens...
How many were going to USA???
My secret phone number is
6 3 __ __ __ __ __ __

Whereby the dashes are the answer to the question above...
COMMENT WITH THE SECRET PHONE NUMBER ONLY!!!

Click here for Answer

The Secret Number is 63000001
Only 1 man was going to USA.