25666867 has 2 divisors, whose sum is σ = 25666868. Its totient is φ = 25666866.

The previous prime is 25666859. The next prime is 25666897. The reversal of 25666867 is 76866652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25666867 - 2³ = 25666859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25666897) 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, 12833433 + 12833434.

It is an arithmetic number, because the mean of its divisors is an integer number (12833434).

Almost surely, 2^25666867 is an apocalyptic number.

25666867 is a deficient number, since it is larger than the sum of its proper divisors (1).

25666867 is an equidigital number, since it uses as much as digits as its factorization.

25666867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 46.

The square root of 25666867 is about 5066.2478226001. The cubic root of 25666867 is about 294.9789011052.

The spelling of 25666867 in words is "twenty-five million, six hundred sixty-six thousand, eight hundred sixty-seven".