25966905 has 32 divisors (see below), whose sum is σ = 44582400. Its totient is φ = 12859392.

The previous prime is 25966879. The next prime is 25966909. The reversal of 25966905 is 50966952.

It is not a de Polignac number, because 25966905 - 2⁶ = 25966841 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25966909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19501 + ... + 20789.

It is an arithmetic number, because the mean of its divisors is an integer number (1393200).

Almost surely, 2^25966905 is an apocalyptic number.

It is an amenable number.

25966905 is a deficient number, since it is larger than the sum of its proper divisors (18615495).

25966905 is a wasteful number, since it uses less digits than its factorization.

25966905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393.

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 25966905 is about 5095.7732484874. The cubic root of 25966905 is about 296.1238562814.

The spelling of 25966905 in words is "twenty-five million, nine hundred sixty-six thousand, nine hundred five".