There are Roman numerals, but the Greek numbers are the same as the Arabic, i.e.: 1 2 3 4 etc.
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The ancient greek numerals are :
α,β,γ,δ,ε,στ,ζ,η,θ is 1...9
ι,κ,λ,μ,ν,ξ,ο,π,ϟ is 10...90
ρ,σ,τ,υ,φ,χ,ψ,ω,ϡ is 100...900
for a thousand the used an '','' before the letter. So 1000 was ,α.
2000 was ,β etc.
So 1341 was ,ατμα
2080 was ,βπ
104 was ρδ etc.
αριθμούς (Arithmous)
Greek numerals are a system of representing numbers using the letters of the Greek alphabet. They are also known as Milesian numerals, Alexandrian numerals, or alphabetic numerals. In modern Greece, they are still in use for ordinal numbers.
lxii The above is 62 in Latin numerals. 62 in Greek numerals is ξβ' or (in capital form) ΞΒ'
You
Why did society need numerals
In roman numerals it would be MMXII
XXC
CXV
MMVIII
greek mythology
1946 = MCMXLVI
Tradition, and also because Roman numerals are more recognisable than ancient Greek numerals.
There is insufficient space to list 3,000 Roman numerals!