25338661 has 2 divisors, whose sum is σ = 25338662. Its totient is φ = 25338660.

The previous prime is 25338637. The next prime is 25338667. The reversal of 25338661 is 16683352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22982436 + 2356225 = 4794^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 25338661 - 2⁵ = 25338629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25338667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12669330 + 12669331.

It is an arithmetic number, because the mean of its divisors is an integer number (12669331).

Almost surely, 2^25338661 is an apocalyptic number.

It is an amenable number.

25338661 is a deficient number, since it is larger than the sum of its proper divisors (1).

25338661 is an equidigital number, since it uses as much as digits as its factorization.

25338661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 25338661 is about 5033.7521790410. The cubic root of 25338661 is about 293.7161907067.

The spelling of 25338661 in words is "twenty-five million, three hundred thirty-eight thousand, six hundred sixty-one".