266864256 has 96 divisors (see below), whose sum is σ = 777460320. Its totient is φ = 87851520.

The previous prime is 266864243. The next prime is 266864287. The reversal of 266864256 is 652468662.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×266864256² = 142433062260867072, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94221 + ... + 97011.

It is an arithmetic number, because the mean of its divisors is an integer number (8098545).

Almost surely, 2^266864256 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 266864256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388730160).

266864256 is an abundant number, since it is smaller than the sum of its proper divisors (510596064).

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

266864256 is a wasteful number, since it uses less digits than its factorization.

266864256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894 (or 2879 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 266864256 is about 16335.9804113497. The cubic root of 266864256 is about 643.8185258250.

The spelling of 266864256 in words is "two hundred sixty-six million, eight hundred sixty-four thousand, two hundred fifty-six".