266844648 has 128 divisors (see below), whose sum is σ = 812747520. Its totient is φ = 71270400.

The previous prime is 266844647. The next prime is 266844649. The reversal of 266844648 is 846448662.

It is an interprime number because it is at equal distance from previous prime (266844647) and next prime (266844649).

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

It is a junction number, because it is equal to n+sod(n) for n = 266844597 and 266844606.

It is not an unprimeable number, because it can be changed into a prime (266844647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 665248 + ... + 665648.

It is an arithmetic number, because the mean of its divisors is an integer number (6349590).

Almost surely, 2^266844648 is an apocalyptic number.

266844648 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 266844648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406373760).

266844648 is an abundant number, since it is smaller than the sum of its proper divisors (545902872).

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

266844648 is a wasteful number, since it uses less digits than its factorization.

266844648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667 (or 663 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 48.

The square root of 266844648 is about 16335.3802526908. The cubic root of 266844648 is about 643.8027571304.

The spelling of 266844648 in words is "two hundred sixty-six million, eight hundred forty-four thousand, six hundred forty-eight".