266866488 has 128 divisors (see below), whose sum is σ = 858048000. Its totient is φ = 76212576.

The previous prime is 266866477. The next prime is 266866489. The reversal of 266866488 is 884668662.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266866489) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121383 + ... + 123561.

It is an arithmetic number, because the mean of its divisors is an integer number (6703500).

Almost surely, 2^266866488 is an apocalyptic number.

266866488 is a gapful number since it is divisible by the number (28) 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 266866488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (429024000).

266866488 is an abundant number, since it is smaller than the sum of its proper divisors (591181512).

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

266866488 is an equidigital number, since it uses as much as digits as its factorization.

266866488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213 (or 2191 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 54.

The square root of 266866488 is about 16336.0487266658. The cubic root of 266866488 is about 643.8203207437.

The spelling of 266866488 in words is "two hundred sixty-six million, eight hundred sixty-six thousand, four hundred eighty-eight".