25664741 has 2 divisors, whose sum is σ = 25664742. Its totient is φ = 25664740.

The previous prime is 25664701. The next prime is 25664753. The reversal of 25664741 is 14746652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20511841 + 5152900 = 4529^2 + 2270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25664741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25664701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12832370 + 12832371.

It is an arithmetic number, because the mean of its divisors is an integer number (12832371).

Almost surely, 2^25664741 is an apocalyptic number.

It is an amenable number.

25664741 is a deficient number, since it is larger than the sum of its proper divisors (1).

25664741 is an equidigital number, since it uses as much as digits as its factorization.

25664741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 25664741 is about 5066.0379982783. The cubic root of 25664741 is about 294.9707564615.

The spelling of 25664741 in words is "twenty-five million, six hundred sixty-four thousand, seven hundred forty-one".