8557668 has 72 divisors (see below), whose sum is σ = 25596480. Its totient is φ = 2358720.

The previous prime is 8557649. The next prime is 8557691. The reversal of 8557668 is 8667558.

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, 6723 + ... + 7893.

Almost surely, 2^8557668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8557668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12798240).

8557668 is an abundant number, since it is smaller than the sum of its proper divisors (17038812).

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

8557668 is a wasteful number, since it uses less digits than its factorization.

8557668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217 (or 1212 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 8557668 is about 2925.3492099235. The cubic root of 8557668 is about 204.5432464139.

The spelling of 8557668 in words is "eight million, five hundred fifty-seven thousand, six hundred sixty-eight".