For dowloading the data with their original name, you may use the -JO parameter of curl as in the following example:

    curl -u username:password -JO "https://scihub.esa.int/dhus/odata/v1/Products('177db57e-56ca-4588-830a-cfb8712ecf6f')/$value

If you think about listing the products, you could try the following for ten product from the 20th:

    curl -u username:password "https://scihub.esa.int/dhus/odata/v1/Products?$skip=19&$top=10"

You can get the full data model exposed via the following call:

    curl -u username:password "https://scihub.esa.int/dhus/odata/v1/$metadata"

It should be a good starting point for building the OData URLs and browse the content of a DHuS, download the products, get metadata, quicklook, GML footprint or even get values extracted the product content i.e. file content.

I hope this helps. Do not hesitate for any further information ;)