25660668 has 48 divisors (see below), whose sum is σ = 66237696. Its totient is φ = 7666560.

The previous prime is 25660619. The next prime is 25660669. The reversal of 25660668 is 86606652.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25660669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8305 + ... + 10967.

It is an arithmetic number, because the mean of its divisors is an integer number (1379952).

Almost surely, 2^25660668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25660668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33118848).

25660668 is an abundant number, since it is smaller than the sum of its proper divisors (40577028).

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

25660668 is a wasteful number, since it uses less digits than its factorization.

25660668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754 (or 2752 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 25660668 is about 5065.6359916599. The cubic root of 25660668 is about 294.9551516615.

The spelling of 25660668 in words is "twenty-five million, six hundred sixty thousand, six hundred sixty-eight".