25668720 has 240 divisors, whose sum is σ = 107707392. Its totient is φ = 5322240.

The previous prime is 25668707. The next prime is 25668743. The reversal of 25668720 is 2786652.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55209 + ... + 55671.

Almost surely, 2^25668720 is an apocalyptic number.

25668720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25668720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53853696).

25668720 is an abundant number, since it is smaller than the sum of its proper divisors (82038672).

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

25668720 is a wasteful number, since it uses less digits than its factorization.

25668720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 25668720 is about 5066.4306962594. The cubic root of 25668720 is about 294.9859995271.

The spelling of 25668720 in words is "twenty-five million, six hundred sixty-eight thousand, seven hundred twenty".