266828225 has 6 divisors (see below), whose sum is σ = 330867030. Its totient is φ = 213462560.

The previous prime is 266828189. The next prime is 266828239. The reversal of 266828225 is 522828662.

It can be written as a sum of positive squares in 3 ways, for example, as 36881329 + 229946896 = 6073^2 + 15164^2 .

It is not a de Polignac number, because 266828225 - 2¹⁰ = 266827201 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5336540 + ... + 5336589.

It is an arithmetic number, because the mean of its divisors is an integer number (55144505).

Almost surely, 2^266828225 is an apocalyptic number.

266828225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266828225 is a deficient number, since it is larger than the sum of its proper divisors (64038805).

266828225 is a wasteful number, since it uses less digits than its factorization.

266828225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10673139 (or 10673134 counting only the distinct ones).

The product of its digits is 184320, while the sum is 41.

The square root of 266828225 is about 16334.8775630551. The cubic root of 266828225 is about 643.7895492088.

The spelling of 266828225 in words is "two hundred sixty-six million, eight hundred twenty-eight thousand, two hundred twenty-five".