It is a nialpdrome in base 8.
It is a congruent number.
It is an unprimeable number.
2177664 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 177664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178002).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
177664 is an frugal number, since it uses more digits than its factorization.
177664 is an evil number, because the sum of its binary digits is even.
The square root of 177664 is about 421.5020759142. The cubic root of 177664 is about 56.2168463067.
The spelling of 177664 in words is "one hundred seventy-seven thousand, six hundred sixty-four".