Declension table of ?ṣaṭsapta

Neuter	Singular	Dual	Plural
Nominative	ṣaṭsaptam	ṣaṭsapte	ṣaṭsaptāni
Vocative	ṣaṭsapta	ṣaṭsapte	ṣaṭsaptāni
Accusative	ṣaṭsaptam	ṣaṭsapte	ṣaṭsaptāni
Instrumental	ṣaṭsaptena	ṣaṭsaptābhyām	ṣaṭsaptaiḥ
Dative	ṣaṭsaptāya	ṣaṭsaptābhyām	ṣaṭsaptebhyaḥ
Ablative	ṣaṭsaptāt	ṣaṭsaptābhyām	ṣaṭsaptebhyaḥ
Genitive	ṣaṭsaptasya	ṣaṭsaptayoḥ	ṣaṭsaptānām
Locative	ṣaṭsapte	ṣaṭsaptayoḥ	ṣaṭsapteṣu

Compound ṣaṭsapta -

Adverb -ṣaṭsaptam -ṣaṭsaptāt