366181 has 2 divisors, whose sum is σ = 366182. Its totient is φ = 366180.

The previous prime is 366173. The next prime is 366193. The reversal of 366181 is 181663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349281 + 16900 = 591^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 366181 - 2³ = 366173 is a prime.

It is a super-2 number, since 2×366181² = 268177049522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (366161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183090 + 183091.

It is an arithmetic number, because the mean of its divisors is an integer number (183091).

2³⁶⁶¹⁸¹ is an apocalyptic number.

It is an amenable number.

366181 is a deficient number, since it is larger than the sum of its proper divisors (1).

366181 is an equidigital number, since it uses as much as digits as its factorization.

366181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 366181 is about 605.1289118857. The cubic root of 366181 is about 71.5426905309.

The spelling of 366181 in words is "three hundred sixty-six thousand, one hundred eighty-one".