266888920 has 96 divisors (see below), whose sum is σ = 637029360. Its totient is φ = 100588800.

The previous prime is 266888911. The next prime is 266888927. The reversal of 266888920 is 29888662.

266888920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266888927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2037255 + ... + 2037385.

Almost surely, 2^266888920 is an apocalyptic number.

266888920 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 266888920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318514680).

266888920 is an abundant number, since it is smaller than the sum of its proper divisors (370140440).

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

266888920 is a wasteful number, since it uses less digits than its factorization.

266888920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The square root of 266888920 is about 16336.7352919731. The cubic root of 266888920 is about 643.8383594428.

The spelling of 266888920 in words is "two hundred sixty-six million, eight hundred eighty-eight thousand, nine hundred twenty".