8856441666 has 56 divisors (see below), whose sum is σ = 19989689004. Its totient is φ = 2941505280.

The previous prime is 8856441613. The next prime is 8856441683. The reversal of 8856441666 is 6661446588.

It can be written as a sum of positive squares in 2 ways, for example, as 8793000441 + 63441225 = 93771^2 + 7965^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 398890 + ... + 420506.

Almost surely, 2^8856441666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8856441666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9994844502).

8856441666 is an abundant number, since it is smaller than the sum of its proper divisors (11133247338).

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

8856441666 is a wasteful number, since it uses less digits than its factorization.

8856441666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21918 (or 21903 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The square root of 8856441666 is about 94108.6694518629. The cubic root of 8856441666 is about 2068.9647375223.

The spelling of 8856441666 in words is "eight billion, eight hundred fifty-six million, four hundred forty-one thousand, six hundred sixty-six".