Filter Dynamics 365 CRM query on datetime columns issu

Hey,

I'm trying to run an OData Query in Dynamics 365 to filter on a datetime field and get the following error:

{ "code": "", "message": "Unrecognized 'Edm.String' literal 'datetime'2017-07-10T10:10:36Z'' at '81' in  'modifiedon ge datetime'2017-07-10T10:10:36Z''.", "innererror": { "message": "Unrecognized 'Edm.String' literal 'datetime'2017-07-10T10:10:36Z'' at '81' in 'modifiedon ge datetime'2017-07-10T10:10:36Z''.", "type": "Microsoft.OData.Core.ODataException", "stacktrace": "...

What is wrong with this query: modifiedon ge datetime'2017-07-10T10:10:36Z'