25665030 has 48 divisors (see below), whose sum is σ = 67111200. Its totient is φ = 6804864.

The previous prime is 25664983. The next prime is 25665041. The reversal of 25665030 is 3056652.

25665030 is a `hidden beast` number, since 2 + 5 + 6 + 650 + 3 + 0 = 666.

25665030 is a nontrivial binomial coefficient, being equal to C(7165, 2).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25664985 and 25665003.

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, 17194 + ... + 18626.

It is an arithmetic number, because the mean of its divisors is an integer number (1398150).

Almost surely, 2^25665030 is an apocalyptic number.

25665030 is the 7164-th triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25665030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33555600).

25665030 is an abundant number, since it is smaller than the sum of its proper divisors (41446170).

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

25665030 is a wasteful number, since it uses less digits than its factorization.

25665030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 25665030 is about 5066.0665214740. The cubic root of 25665030 is about 294.9718636384.

The spelling of 25665030 in words is "twenty-five million, six hundred sixty-five thousand, thirty".