25452666 has 36 divisors (see below), whose sum is σ = 58217562. Its totient is φ = 8035632.

The previous prime is 25452653. The next prime is 25452671. The reversal of 25452666 is 66625452.

It can be written as a sum of positive squares in only one way, i.e., 18275625 + 7177041 = 4275^2 + 2679^2 .

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 25452666.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4540 + ... + 8456.

Almost surely, 2^25452666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25452666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29108781).

25452666 is an abundant number, since it is smaller than the sum of its proper divisors (32764896).

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

25452666 is a wasteful number, since it uses less digits than its factorization.

25452666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3963 (or 3941 counting only the distinct ones).

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

The square root of 25452666 is about 5045.0635278458. The cubic root of 25452666 is about 294.1560326826.

The spelling of 25452666 in words is "twenty-five million, four hundred fifty-two thousand, six hundred sixty-six".