25666903 has 2 divisors, whose sum is σ = 25666904. Its totient is φ = 25666902.

The previous prime is 25666897. The next prime is 25666969. The reversal of 25666903 is 30966652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25666903 - 2⁹ = 25666391 is a prime.

It is a super-2 number, since 2×25666903² = 1317579819222818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25666973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12833451 + 12833452.

It is an arithmetic number, because the mean of its divisors is an integer number (12833452).

Almost surely, 2^25666903 is an apocalyptic number.

25666903 is a deficient number, since it is larger than the sum of its proper divisors (1).

25666903 is an equidigital number, since it uses as much as digits as its factorization.

25666903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 25666903 is about 5066.2513755241. The cubic root of 25666903 is about 294.9790390163.

It can be divided in two parts, 25666 and 903, that added together give a square (26569 = 163²).

The spelling of 25666903 in words is "twenty-five million, six hundred sixty-six thousand, nine hundred three".