ISBN 9780716647 hat failed the check­sum digit test.
The following 20 formally correct ISBNs were determined. Starting from these ISBNs the value 9780716647 that you input could have resulted frome one error (error in one digit or transposition of two digits.) You can now check using the links given for the catalogs of amazon.co.uk, amazon.com and amazon.de whether any book is listed for the respective URL. To the home page
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ISBN prefix group: English language
ISBNas­su­med er­rorCatalogs for checking
0-7807-1664-7first digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: China, People's Republic
ISBNas­su­med er­rorCatalogs for checking
7-980716-64-71st and 2nd digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Denmark
ISBNas­su­med er­rorCatalogs for checking
87-90716-64-71st and 3rd digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Sweden
ISBNas­su­med er­rorCatalogs for checking
91-8077-664-72nd and 6th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Thailand
ISBNas­su­med er­rorCatalogs for checking
974-07-1668-73rd and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Turkey
ISBNas­su­med er­rorCatalogs for checking
975-07-1664-7third digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Egypt
ISBNas­su­med er­rorCatalogs for checking
977-08-1664-73rd and 5th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Nigeria
ISBNas­su­med er­rorCatalogs for checking
978-031-664-7fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
978-061-764-75th and 7th digits were swap­ped. amazon.co.uk amazon.com amazon.de
978-071-064-7seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
978-071-646-78th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
978-071-663-7ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
978-071-664-5tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
978-071-694-7eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
978-074-661-76th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
978-075-664-7sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
978-47166-0-74th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
978-67166-4-7fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
978-77166-4-04th and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Hong Kong, China
ISBNas­su­med er­rorCatalogs for checking
988-07-1664-7second digit was chan­ged. amazon.co.uk amazon.com amazon.de

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