25866330 has 64 divisors (see below), whose sum is σ = 72887040. Its totient is φ = 5750784.

The previous prime is 25866317. The next prime is 25866341. The reversal of 25866330 is 3366852.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25866291 and 25866300.

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 31 ways as a sum of consecutive naturals, for example, 6106 + ... + 9434.

It is an arithmetic number, because the mean of its divisors is an integer number (1138860).

Almost surely, 2^25866330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25866330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36443520).

25866330 is an abundant number, since it is smaller than the sum of its proper divisors (47020710).

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

25866330 is a wasteful number, since it uses less digits than its factorization.

25866330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 25866330 is about 5085.8952014370. The cubic root of 25866330 is about 295.7410460442.

The spelling of 25866330 in words is "twenty-five million, eight hundred sixty-six thousand, three hundred thirty".