8166827220 has 48 divisors (see below), whose sum is σ = 23485152768. Its totient is φ = 2118960000.

The previous prime is 8166827213. The next prime is 8166827261. The reversal of 8166827220 is 227286618.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 1837156 + ... + 1841595.

It is an arithmetic number, because the mean of its divisors is an integer number (489274016).

Almost surely, 2^8166827220 is an apocalyptic number.

It is an amenable number.

8166827220 is an abundant number, since it is smaller than the sum of its proper divisors (15318325548).

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

8166827220 is a wasteful number, since it uses less digits than its factorization.

8166827220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3678800 (or 3678798 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 8166827220 is about 90370.4997219779. The cubic root of 8166827220 is about 2013.8067360266.

The spelling of 8166827220 in words is "eight billion, one hundred sixty-six million, eight hundred twenty-seven thousand, two hundred twenty".