It is an unprimeable number.
Almost surely, 2266823720 is an apocalyptic number.
266823720 is a gapful number since it is divisible by the number (20) 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 266823720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455888160).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
266823720 is a wasteful number, since it uses less digits than its factorization.
266823720 is an odious number, because the sum of its binary digits is odd.
The square root of 266823720 is about 16334.7396673470. The cubic root of 266823720 is about 643.7859260435.
The spelling of 266823720 in words is "two hundred sixty-six million, eight hundred twenty-three thousand, seven hundred twenty".