25264566 has 48 divisors (see below), whose sum is σ = 59504640. Its totient is φ = 7717680.

The previous prime is 25264543. The next prime is 25264571. The reversal of 25264566 is 66546252.

25264566 is a `hidden beast` number, since 2 + 5 + 2 + 645 + 6 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25264566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9411 + ... + 11793.

It is an arithmetic number, because the mean of its divisors is an integer number (1239680).

Almost surely, 2^25264566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25264566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29752320).

25264566 is an abundant number, since it is smaller than the sum of its proper divisors (34240074).

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

25264566 is a wasteful number, since it uses less digits than its factorization.

25264566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441 (or 2438 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 25264566 is about 5026.3869727668. The cubic root of 25264566 is about 293.4296174394.

The spelling of 25264566 in words is "twenty-five million, two hundred sixty-four thousand, five hundred sixty-six".