25604166 has 48 divisors (see below), whose sum is σ = 60435504. Its totient is φ = 7209216.

The previous prime is 25604147. The next prime is 25604167. The reversal of 25604166 is 66140652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25604167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20866 + ... + 22058.

It is an arithmetic number, because the mean of its divisors is an integer number (1259073).

Almost surely, 2^25604166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25604166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30217752).

25604166 is an abundant number, since it is smaller than the sum of its proper divisors (34831338).

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

25604166 is a wasteful number, since it uses less digits than its factorization.

25604166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 25604166 is about 5060.0559285447. The cubic root of 25604166 is about 294.7385061858.

The spelling of 25604166 in words is "twenty-five million, six hundred four thousand, one hundred sixty-six".