266722144 has 48 divisors (see below), whose sum is σ = 573314112. Its totient is φ = 121402368.

The previous prime is 266722139. The next prime is 266722147. The reversal of 266722144 is 441227662.

It is a super-2 number, since 2×266722144² = 142281404199913472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266722147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25977 + ... + 34759.

It is an arithmetic number, because the mean of its divisors is an integer number (11944044).

Almost surely, 2^266722144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266722144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286657056).

266722144 is an abundant number, since it is smaller than the sum of its proper divisors (306591968).

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

266722144 is a wasteful number, since it uses less digits than its factorization.

266722144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8879 (or 8871 counting only the distinct ones).

The product of its digits is 32256, while the sum is 34.

The square root of 266722144 is about 16331.6301697044. The cubic root of 266722144 is about 643.7042222891.

The spelling of 266722144 in words is "two hundred sixty-six million, seven hundred twenty-two thousand, one hundred forty-four".