8166181 has 6 divisors (see below), whose sum is σ = 8618982. Its totient is φ = 7736040.

The previous prime is 8166107. The next prime is 8166209. The reversal of 8166181 is 1816618.

It is a happy number.

8166181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8122500 + 43681 = 2850^2 + 209^2 .

It is not a de Polignac number, because 8166181 - 2¹⁵ = 8133413 is a prime.

It is a super-2 number, since 2×8166181² = 133373024249522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8166581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10950 + ... + 11671.

It is an arithmetic number, because the mean of its divisors is an integer number (1436497).

Almost surely, 2^8166181 is an apocalyptic number.

It is an amenable number.

8166181 is a deficient number, since it is larger than the sum of its proper divisors (452801).

8166181 is a wasteful number, since it uses less digits than its factorization.

8166181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22659 (or 22640 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 8166181 is about 2857.6530580181. The cubic root of 8166181 is about 201.3753618846.

The spelling of 8166181 in words is "eight million, one hundred sixty-six thousand, one hundred eighty-one".