10855566 has 32 divisors (see below), whose sum is σ = 24585120. Its totient is φ = 3549312.

The previous prime is 10855553. The next prime is 10855567. The reversal of 10855566 is 66555801.

10855566 is a `hidden beast` number, since 10 + 85 + 5 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 10855566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10855567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 966 + ... + 4758.

It is an arithmetic number, because the mean of its divisors is an integer number (768285).

Almost surely, 2^10855566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10855566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12292560).

10855566 is an abundant number, since it is smaller than the sum of its proper divisors (13729554).

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

10855566 is a wasteful number, since it uses less digits than its factorization.

10855566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857 (or 3851 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 10855566 is about 3294.7785965069. The cubic root of 10855566 is about 221.4203284777.

The spelling of 10855566 in words is "ten million, eight hundred fifty-five thousand, five hundred sixty-six".