Interpret a UUID

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UUID: 
Your input:                      6640d91d-6bca-458b-ae8e-bcd74b8571e1

Various notations:

URN:                             urn:uuid:6640d91d-6bca-458b-ae8e-bcd74b8571e1
URI:                             uuid:6640d91d-6bca-458b-ae8e-bcd74b8571e1
Microsoft GUID syntax:           {6640D91D-6BCA-458B-AE8E-BCD74B8571E1}
C++ struct syntax:               { 0x6640d91d, 0x6bca, 0x458b, { 0xae, 0x8e, 0xbc, 0xd7, 0x4b, 0x85, 0x71, 0xe1 } }

As OID (ISO/ITU-T 128 bits):     2.25.135917966182867780816971078820121899489
As OID (Microsoft):              1.2.840.113556.1.8000.2554.26176.55581.27594.17803.44686.12375883.8745441
As OID (Waterjuice 2x64 bits):   1.3.6.1.4.1.54392.1.7368127710763828619.12578198442163401185
As OID (Waterjuice 4x32 bits):   1.3.6.1.4.1.54392.2.1715525917.1808418187.2928590039.1267036641
As OID (Waterjuice 8x16 bits):   1.3.6.1.4.1.54392.3.26176.55581.27594.17803.44686.48343.19333.29153

Interpretation of the UUID:

Variant:                         [0b10_] RFC 4122 (Leach-Mealling-Salz)
Version:                         [0x4] Random
Random bits:                     01100110 01000000 11011001 00011101 01101011 11001010 ????0101 10001011
                                 ??101110 10001110 10111100 11010111 01001011 10000101 01110001 11100001
Random bytes:                    [0x6640d91d6bca?58b?e8ebcd74b8571e1]