25666133 has 2 divisors, whose sum is σ = 25666134. Its totient is φ = 25666132.

The previous prime is 25666129. The next prime is 25666153. The reversal of 25666133 is 33166652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25180324 + 485809 = 5018^2 + 697^2 .

It is a cyclic number.

It is not a de Polignac number, because 25666133 - 2² = 25666129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25666133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25666153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12833066 + 12833067.

It is an arithmetic number, because the mean of its divisors is an integer number (12833067).

Almost surely, 2^25666133 is an apocalyptic number.

It is an amenable number.

25666133 is a deficient number, since it is larger than the sum of its proper divisors (1).

25666133 is an equidigital number, since it uses as much as digits as its factorization.

25666133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 32.

The square root of 25666133 is about 5066.1753818833. The cubic root of 25666133 is about 294.9760892235.

The spelling of 25666133 in words is "twenty-five million, six hundred sixty-six thousand, one hundred thirty-three".