25963566 has 16 divisors (see below), whose sum is σ = 53331024. Its totient is φ = 8420544.

The previous prime is 25963559. The next prime is 25963577. The reversal of 25963566 is 66536952.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58255 + ... + 58698.

It is an arithmetic number, because the mean of its divisors is an integer number (3333189).

Almost surely, 2^25963566 is an apocalyptic number.

25963566 is an abundant number, since it is smaller than the sum of its proper divisors (27367458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25963566 is a wasteful number, since it uses less digits than its factorization.

25963566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116995.

The product of its digits is 291600, while the sum is 42.

The square root of 25963566 is about 5095.4456134866. The cubic root of 25963566 is about 296.1111632022. Note that the first 4 decimals are identical.

The spelling of 25963566 in words is "twenty-five million, nine hundred sixty-three thousand, five hundred sixty-six".