366865649 has 2 divisors, whose sum is σ = 366865650. Its totient is φ = 366865648.

The previous prime is 366865643. The next prime is 366865711. The reversal of 366865649 is 946568663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197683600 + 169182049 = 14060^2 + 13007^2 .

It is a cyclic number.

It is not a de Polignac number, because 366865649 - 2²⁰ = 365817073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 366865649.

It is not a weakly prime, because it can be changed into another prime (366865643) by changing a digit.

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 as a sum of consecutive naturals, namely, 183432824 + 183432825.

It is an arithmetic number, because the mean of its divisors is an integer number (183432825).

Almost surely, 2^366865649 is an apocalyptic number.

It is an amenable number.

366865649 is a deficient number, since it is larger than the sum of its proper divisors (1).

366865649 is an equidigital number, since it uses as much as digits as its factorization.

366865649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 53.

The square root of 366865649 is about 19153.7372071353. The cubic root of 366865649 is about 715.8725058563.

The spelling of 366865649 in words is "three hundred sixty-six million, eight hundred sixty-five thousand, six hundred forty-nine".