266004225 has 36 divisors (see below), whose sum is σ = 484278652. Its totient is φ = 139536000.

The previous prime is 266004197. The next prime is 266004229. The reversal of 266004225 is 522400662.

It can be written as a sum of positive squares in 6 ways, for example, as 22924944 + 243079281 = 4788^2 + 15591^2 .

It is not a de Polignac number, because 266004225 - 2¹⁹ = 265479937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266004229) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4035 + ... + 23415.

Almost surely, 2^266004225 is an apocalyptic number.

266004225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266004225 is a deficient number, since it is larger than the sum of its proper divisors (218274427).

266004225 is a wasteful number, since it uses less digits than its factorization.

266004225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19458 (or 19450 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 266004225 is about 16309.6359554712. The cubic root of 266004225 is about 643.1261641245.

Adding to 266004225 its reverse (522400662), we get a palindrome (788404887).

The spelling of 266004225 in words is "two hundred sixty-six million, four thousand, two hundred twenty-five".