366540217 has 2 divisors, whose sum is σ = 366540218. Its totient is φ = 366540216.

The previous prime is 366540203. The next prime is 366540253. The reversal of 366540217 is 712045663.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 327465216 + 39075001 = 18096^2 + 6251^2 .

It is a cyclic number.

It is not a de Polignac number, because 366540217 - 2¹⁹ = 366015929 is a prime.

It is not a weakly prime, because it can be changed into another prime (366540257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183270108 + 183270109.

It is an arithmetic number, because the mean of its divisors is an integer number (183270109).

Almost surely, 2^366540217 is an apocalyptic number.

It is an amenable number.

366540217 is a deficient number, since it is larger than the sum of its proper divisors (1).

366540217 is an equidigital number, since it uses as much as digits as its factorization.

366540217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 366540217 is about 19145.2400611745. The cubic root of 366540217 is about 715.6607691789.

The spelling of 366540217 in words is "three hundred sixty-six million, five hundred forty thousand, two hundred seventeen".