8664181 has 2 divisors, whose sum is σ = 8664182. Its totient is φ = 8664180.

The previous prime is 8664157. The next prime is 8664193. The reversal of 8664181 is 1814668.

8664181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8071281 + 592900 = 2841^2 + 770^2 .

It is a cyclic number.

It is not a de Polignac number, because 8664181 - 2⁷ = 8664053 is a prime.

It is a super-2 number, since 2×8664181² = 150136064801522, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8664581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4332090 + 4332091.

It is an arithmetic number, because the mean of its divisors is an integer number (4332091).

Almost surely, 2^8664181 is an apocalyptic number.

It is an amenable number.

8664181 is a deficient number, since it is larger than the sum of its proper divisors (1).

8664181 is an equidigital number, since it uses as much as digits as its factorization.

8664181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 34.

The square root of 8664181 is about 2943.4980890091. The cubic root of 8664181 is about 205.3883655153.

The spelling of 8664181 in words is "eight million, six hundred sixty-four thousand, one hundred eighty-one".