It is a congruent number.
Almost surely, 21669995000 is an apocalyptic number.
1669995000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1669995000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3125093400).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1669995000 is a wasteful number, since it uses less digits than its factorization.
1669995000 is an odious number, because the sum of its binary digits is odd.
The square root of 1669995000 is about 40865.5723072613. The cubic root of 1669995000 is about 1186.4198118145.
The spelling of 1669995000 in words is "one billion, six hundred sixty-nine million, nine hundred ninety-five thousand".