25795661 has 2 divisors, whose sum is σ = 25795662. Its totient is φ = 25795660.

The previous prime is 25795643. The next prime is 25795687. The reversal of 25795661 is 16659752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24940036 + 855625 = 4994^2 + 925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25795661 is a prime.

It is a super-2 number, since 2×25795661² = 1330832252853842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25795691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12897830 + 12897831.

It is an arithmetic number, because the mean of its divisors is an integer number (12897831).

Almost surely, 2^25795661 is an apocalyptic number.

It is an amenable number.

25795661 is a deficient number, since it is larger than the sum of its proper divisors (1).

25795661 is an equidigital number, since it uses as much as digits as its factorization.

25795661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 41.

The square root of 25795661 is about 5078.9429018251. The cubic root of 25795661 is about 295.4714705484.

The spelling of 25795661 in words is "twenty-five million, seven hundred ninety-five thousand, six hundred sixty-one".