25655166 has 48 divisors (see below), whose sum is σ = 59904000. Its totient is φ = 7912080.

The previous prime is 25655117. The next prime is 25655167. The reversal of 25655166 is 66155652.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25655166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25655167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11835 + ... + 13833.

It is an arithmetic number, because the mean of its divisors is an integer number (1248000).

Almost surely, 2^25655166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25655166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29952000).

25655166 is an abundant number, since it is smaller than the sum of its proper divisors (34248834).

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

25655166 is a wasteful number, since it uses less digits than its factorization.

25655166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061 (or 2058 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 25655166 is about 5065.0928915470. The cubic root of 25655166 is about 294.9340693415.

The spelling of 25655166 in words is "twenty-five million, six hundred fifty-five thousand, one hundred sixty-six".