266504256 has 140 divisors (see below), whose sum is σ = 799391340. Its totient is φ = 87782400.

The previous prime is 266504201. The next prime is 266504261. The reversal of 266504256 is 652405662.

It can be written as a sum of positive squares in 2 ways, for example, as 239630400 + 26873856 = 15480^2 + 5184^2 .

It is a super-2 number, since 2×266504256² = 142049036932227072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 266504256.

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 19 ways as a sum of consecutive naturals, for example, 523330 + ... + 523838.

Almost surely, 2^266504256 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 266504256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399695670).

266504256 is an abundant number, since it is smaller than the sum of its proper divisors (532887084).

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

266504256 is a wasteful number, since it uses less digits than its factorization.

266504256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 266504256 is about 16324.9580703903. The cubic root of 266504256 is about 643.5288917212.

The spelling of 266504256 in words is "two hundred sixty-six million, five hundred four thousand, two hundred fifty-six".