26664225 has 24 divisors (see below), whose sum is σ = 50383680. Its totient is φ = 12189120.

The previous prime is 26664223. The next prime is 26664241. The reversal of 26664225 is 52246662.

It is not a de Polignac number, because 26664225 - 2¹ = 26664223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26664221) 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, 24870 + ... + 25919.

It is an arithmetic number, because the mean of its divisors is an integer number (2099320).

Almost surely, 2^26664225 is an apocalyptic number.

26664225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26664225 is a deficient number, since it is larger than the sum of its proper divisors (23719455).

26664225 is a wasteful number, since it uses less digits than its factorization.

26664225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50809 (or 50804 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 26664225 is about 5163.7413761729. The cubic root of 26664225 is about 298.7511977450.

The spelling of 26664225 in words is "twenty-six million, six hundred sixty-four thousand, two hundred twenty-five".