The square root of 16777216 is 4096.
The cubic root of 16777216 is 256.
It is a Jordan-Polya number, since it can be written as (2!)24.
It is a Duffinian number.
It is a nialpdrome in base 2, base 4, base 8 and base 16.
In principle, a polygon with 16777216 sides can be constructed with ruler and compass.
It is an impolite number, since it cannot be written as a nontrivial sum of consecutive naturals.
Almost surely, 216777216 is an apocalyptic number.
16777216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
16777216 is the 4096-th square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 16777216
16777216 is an frugal number, since it uses more digits than its factorization.
16777216 is an odious number, because the sum of its binary digits is odd.
The spelling of 16777216 in words is "sixteen million, seven hundred seventy-seven thousand, two hundred sixteen".