266872122 has 48 divisors (see below), whose sum is σ = 640235232. Its totient is φ = 79659360.

The previous prime is 266872121. The next prime is 266872127. The reversal of 266872122 is 221278662.

It is not an unprimeable number, because it can be changed into a prime (266872121) 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, 3208 + ... + 23324.

It is an arithmetic number, because the mean of its divisors is an integer number (13338234).

Almost surely, 2^266872122 is an apocalyptic number.

266872122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 266872122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320117616).

266872122 is an abundant number, since it is smaller than the sum of its proper divisors (373363110).

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

266872122 is a wasteful number, since it uses less digits than its factorization.

266872122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20203 (or 20200 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 266872122 is about 16336.2211664754. The cubic root of 266872122 is about 643.8248514214.

The spelling of 266872122 in words is "two hundred sixty-six million, eight hundred seventy-two thousand, one hundred twenty-two".