266620896 has 120 divisors (see below), whose sum is σ = 811392120. Its totient is φ = 85784832.

The previous prime is 266620891. The next prime is 266620897. The reversal of 266620896 is 698026662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266620891) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 73395 + ... + 76941.

It is an arithmetic number, because the mean of its divisors is an integer number (6761601).

Almost surely, 2^266620896 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 266620896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405696060).

266620896 is an abundant number, since it is smaller than the sum of its proper divisors (544771224).

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

266620896 is a wasteful number, since it uses less digits than its factorization.

266620896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598 (or 3581 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 266620896 is about 16328.5301236823. The cubic root of 266620896 is about 643.6227617193.

The spelling of 266620896 in words is "two hundred sixty-six million, six hundred twenty thousand, eight hundred ninety-six".