266600800 has 72 divisors (see below), whose sum is σ = 689159016. Its totient is φ = 100362240.

The previous prime is 266600777. The next prime is 266600801. The reversal of 266600800 is 8006662.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266600801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3799 + ... + 23401.

It is an arithmetic number, because the mean of its divisors is an integer number (9571653).

Almost surely, 2^266600800 is an apocalyptic number.

266600800 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 266600800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344579508).

266600800 is an abundant number, since it is smaller than the sum of its proper divisors (422558216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266600800 is a wasteful number, since it uses less digits than its factorization.

266600800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19640 (or 19627 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 266600800 is about 16327.9147474501. The cubic root of 266600800 is about 643.6065907337.

The spelling of 266600800 in words is "two hundred sixty-six million, six hundred thousand, eight hundred".