Declension table of ?ṣaṣṭyadhika

Neuter	Singular	Dual	Plural
Nominative	ṣaṣṭyadhikam	ṣaṣṭyadhike	ṣaṣṭyadhikāni
Vocative	ṣaṣṭyadhika	ṣaṣṭyadhike	ṣaṣṭyadhikāni
Accusative	ṣaṣṭyadhikam	ṣaṣṭyadhike	ṣaṣṭyadhikāni
Instrumental	ṣaṣṭyadhikena	ṣaṣṭyadhikābhyām	ṣaṣṭyadhikaiḥ
Dative	ṣaṣṭyadhikāya	ṣaṣṭyadhikābhyām	ṣaṣṭyadhikebhyaḥ
Ablative	ṣaṣṭyadhikāt	ṣaṣṭyadhikābhyām	ṣaṣṭyadhikebhyaḥ
Genitive	ṣaṣṭyadhikasya	ṣaṣṭyadhikayoḥ	ṣaṣṭyadhikānām
Locative	ṣaṣṭyadhike	ṣaṣṭyadhikayoḥ	ṣaṣṭyadhikeṣu

Compound ṣaṣṭyadhika -

Adverb -ṣaṣṭyadhikam -ṣaṣṭyadhikāt