25668653 has 2 divisors, whose sum is σ = 25668654. Its totient is φ = 25668652.

The previous prime is 25668649. The next prime is 25668661. The reversal of 25668653 is 35686652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12866569 + 12802084 = 3587^2 + 3578^2 .

It is a cyclic number.

It is not a de Polignac number, because 25668653 - 2² = 25668649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25668653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25668053) 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 as a sum of consecutive naturals, namely, 12834326 + 12834327.

It is an arithmetic number, because the mean of its divisors is an integer number (12834327).

Almost surely, 2^25668653 is an apocalyptic number.

It is an amenable number.

25668653 is a deficient number, since it is larger than the sum of its proper divisors (1).

25668653 is an equidigital number, since it uses as much as digits as its factorization.

25668653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 41.

The square root of 25668653 is about 5066.4240841051. The cubic root of 25668653 is about 294.9857428713.

The spelling of 25668653 in words is "twenty-five million, six hundred sixty-eight thousand, six hundred fifty-three".