अष्टकवर्गीकरणम्
Ashtaka Classification
The Rigveda is alternatively organized into 8 Ashtakas (अष्टक), each containing 8 Adhyayas (अध्याय). This system divides the text more evenly than the Mandala system.
10,552 ऋचः in 8 अष्टकाः × 8 अध्यायाः = 64 divisions