266238160 has 80 divisors (see below), whose sum is σ = 637258320. Its totient is φ = 103403520.

The previous prime is 266238157. The next prime is 266238163. The reversal of 266238160 is 61832662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (266238157) and next prime (266238163).

It can be written as a sum of positive squares in 8 ways, for example, as 164147344 + 102090816 = 12812^2 + 10104^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266238163) 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 15 ways as a sum of consecutive naturals, for example, 434014 + ... + 434626.

It is an arithmetic number, because the mean of its divisors is an integer number (7965729).

Almost surely, 2^266238160 is an apocalyptic number.

266238160 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 266238160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318629160).

266238160 is an abundant number, since it is smaller than the sum of its proper divisors (371020160).

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

266238160 is a wasteful number, since it uses less digits than its factorization.

266238160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 266238160 is about 16316.8060600106. The cubic root of 266238160 is about 643.3146393726.

The spelling of 266238160 in words is "two hundred sixty-six million, two hundred thirty-eight thousand, one hundred sixty".