Perfect Square
666998747176673568539596037191295851222660799929 is a perfect square (816699912560711352338923 × 816699912560711352338923)
666998747176673568539596037191295851222660799929 is a perfect square (816699912560711352338923 × 816699912560711352338923)
666998747176673568539596037191295851222660799929 is odd
Previous odd number is 666998747176673568539596037191295851222660799927
Next odd number is 666998747176673568539596037191295851222660799931
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