25666760 has 64 divisors (see below), whose sum is σ = 68152320. Its totient is φ = 8513280.

The previous prime is 25666759. The next prime is 25666763. The reversal of 25666760 is 6766652.

It is not an unprimeable number, because it can be changed into a prime (25666763) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7202 + ... + 10158.

It is an arithmetic number, because the mean of its divisors is an integer number (1064880).

Almost surely, 2^25666760 is an apocalyptic number.

25666760 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 25666760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34076160).

25666760 is an abundant number, since it is smaller than the sum of its proper divisors (42485560).

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

25666760 is a wasteful number, since it uses less digits than its factorization.

25666760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3006 (or 3002 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 25666760 is about 5066.2372625056. The cubic root of 25666760 is about 294.9784912021.

The spelling of 25666760 in words is "twenty-five million, six hundred sixty-six thousand, seven hundred sixty".