8425566 has 32 divisors (see below), whose sum is σ = 19234080. Its totient is φ = 2731968.

The previous prime is 8425553. The next prime is 8425577. The reversal of 8425566 is 6655248.

It is a self number, because there is not a number n which added to its sum of digits gives 8425566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111 + ... + 4106.

It is an arithmetic number, because the mean of its divisors is an integer number (601065).

Almost surely, 2^8425566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8425566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9617040).

8425566 is an abundant number, since it is smaller than the sum of its proper divisors (10808514).

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

8425566 is a wasteful number, since it uses less digits than its factorization.

8425566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4265 (or 4259 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 8425566 is about 2902.6825523987. The cubic root of 8425566 is about 203.4852941499.

The spelling of 8425566 in words is "eight million, four hundred twenty-five thousand, five hundred sixty-six".