Of course you can always write them exactly as shown in the question since arabic numbers are used in all western languages. If the question is how would you say this telephone number in Spanish:
Siete-siete-seis
Ocho-siete-nueve-siete
The number seven in Spanish is siete
The ordinal number for ten in Spanish is "décimo"
diecisiete
cien
Cuarenta
dieciséis.
cuarenta
Cinco. This is the spanish written word for the number 5.
Mil treciento
mil quinientos
ciento trece
Cuatrocientos quince