8553666 has 64 divisors (see below), whose sum is σ = 19958400. Its totient is φ = 2419200.

The previous prime is 8553619. The next prime is 8553673. The reversal of 8553666 is 6663558.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78420 + ... + 78528.

It is an arithmetic number, because the mean of its divisors is an integer number (311850).

Almost surely, 2^8553666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8553666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9979200).

8553666 is an abundant number, since it is smaller than the sum of its proper divisors (11404734).

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

8553666 is a wasteful number, since it uses less digits than its factorization.

8553666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195.

The product of its digits is 129600, while the sum is 39.

The square root of 8553666 is about 2924.6651090339. The cubic root of 8553666 is about 204.5113565069.

It can be divided in two parts, 85536 and 66, that multiplied together give a square (5645376 = 2376²).

The spelling of 8553666 in words is "eight million, five hundred fifty-three thousand, six hundred sixty-six".