25566606 has 48 divisors (see below), whose sum is σ = 63174384. Its totient is φ = 7402752.

The previous prime is 25566587. The next prime is 25566631. The reversal of 25566606 is 60666552.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 765 + ... + 7191.

It is an arithmetic number, because the mean of its divisors is an integer number (1316133).

Almost surely, 2^25566606 is an apocalyptic number.

25566606 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25566606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31587192).

25566606 is an abundant number, since it is smaller than the sum of its proper divisors (37607778).

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

25566606 is a wasteful number, since it uses less digits than its factorization.

25566606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6465 (or 6462 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 25566606 is about 5056.3431450011. The cubic root of 25566606 is about 294.5943135580.

The spelling of 25566606 in words is "twenty-five million, five hundred sixty-six thousand, six hundred six".