266478225 has 24 divisors (see below), whose sum is σ = 474469632. Its totient is φ = 131188800.

The previous prime is 266478221. The next prime is 266478239. The reversal of 266478225 is 522874662.

It is not a de Polignac number, because 266478225 - 2² = 266478221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (266478221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135681 + ... + 137630.

It is an arithmetic number, because the mean of its divisors is an integer number (19769568).

Almost surely, 2^266478225 is an apocalyptic number.

266478225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266478225 is a deficient number, since it is larger than the sum of its proper divisors (207991407).

266478225 is a wasteful number, since it uses less digits than its factorization.

266478225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273337 (or 273332 counting only the distinct ones).

The product of its digits is 322560, while the sum is 42.

The square root of 266478225 is about 16324.1607747535. The cubic root of 266478225 is about 643.5079386524.

The spelling of 266478225 in words is "two hundred sixty-six million, four hundred seventy-eight thousand, two hundred twenty-five".