ISBN 0521671866 hat failed the check­sum digit test.
The following 14 formally correct ISBNs were determined. Starting from these ISBNs the value 0521671866 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
0-12-167586-62nd and 7th digits were swap­ped. amazon.co.uk amazon.com amazon.de
0-421-67186-6second digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-521-63186-6sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-521-67156-6eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-521-67186-8tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-521-67187-6ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-521-67786-6seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-521-68176-66th and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de
0-526-67186-6fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-551-67186-6third digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-561-67182-63rd and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Brazil*
ISBNas­su­med er­rorCatalogs for checking
65210718661st and 5th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: China, People's Republic
ISBNas­su­med er­rorCatalogs for checking
7-5216-0186-61st and 6th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Finland
ISBNas­su­med er­rorCatalogs for checking
952-16-7186-6first digit was chan­ged. amazon.co.uk amazon.com amazon.de

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