8166685044 has 96 divisors (see below), whose sum is σ = 22489815040. Its totient is φ = 2258057088.

The previous prime is 8166685039. The next prime is 8166685117. The reversal of 8166685044 is 4405866618.

It is a junction number, because it is equal to n+sod(n) for n = 8166684984 and 8166685002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 383337 + ... + 404079.

Almost surely, 2^8166685044 is an apocalyptic number.

8166685044 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8166685044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11244907520).

8166685044 is an abundant number, since it is smaller than the sum of its proper divisors (14323129996).

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

8166685044 is a wasteful number, since it uses less digits than its factorization.

8166685044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20909 (or 20907 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 8166685044 is about 90369.7130901720. The cubic root of 8166685044 is about 2013.7950498626.

The spelling of 8166685044 in words is "eight billion, one hundred sixty-six million, six hundred eighty-five thousand, forty-four".