366965561 has 2 divisors, whose sum is σ = 366965562. Its totient is φ = 366965560.

The previous prime is 366965551. The next prime is 366965581. The reversal of 366965561 is 165569663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366952336 + 13225 = 19156^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 366965561 - 2⁶ = 366965497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (366965531) 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, 183482780 + 183482781.

It is an arithmetic number, because the mean of its divisors is an integer number (183482781).

Almost surely, 2^366965561 is an apocalyptic number.

It is an amenable number.

366965561 is a deficient number, since it is larger than the sum of its proper divisors (1).

366965561 is an equidigital number, since it uses as much as digits as its factorization.

366965561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 874800, while the sum is 47.

The square root of 366965561 is about 19156.3451889968. The cubic root of 366965561 is about 715.9374867397.

The spelling of 366965561 in words is "three hundred sixty-six million, nine hundred sixty-five thousand, five hundred sixty-one".