366536561 has 2 divisors, whose sum is σ = 366536562. Its totient is φ = 366536560.

The previous prime is 366536557. The next prime is 366536587. The reversal of 366536561 is 165635663.

366536561 is nontrivially palindromic in base 5.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343917025 + 22619536 = 18545^2 + 4756^2 .

It is a cyclic number.

It is not a de Polignac number, because 366536561 - 2² = 366536557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (366536501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183268280 + 183268281.

It is an arithmetic number, because the mean of its divisors is an integer number (183268281).

Almost surely, 2^366536561 is an apocalyptic number.

It is an amenable number.

366536561 is a deficient number, since it is larger than the sum of its proper divisors (1).

366536561 is an equidigital number, since it uses as much as digits as its factorization.

366536561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 41.

The square root of 366536561 is about 19145.1445802846. The cubic root of 366536561 is about 715.6583897542.

The spelling of 366536561 in words is "three hundred sixty-six million, five hundred thirty-six thousand, five hundred sixty-one".