558661 has 2 divisors, whose sum is σ = 558662. Its totient is φ = 558660.

The previous prime is 558643. The next prime is 558683. The reversal of 558661 is 166855.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 422500 + 136161 = 650^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 558661 - 2⁵ = 558629 is a prime.

It is a super-2 number, since 2×558661² = 624204225842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (558611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 279330 + 279331.

It is an arithmetic number, because the mean of its divisors is an integer number (279331).

2⁵⁵⁸⁶⁶¹ is an apocalyptic number.

It is an amenable number.

558661 is a deficient number, since it is larger than the sum of its proper divisors (1).

558661 is an equidigital number, since it uses as much as digits as its factorization.

558661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The square root of 558661 is about 747.4362849100. The cubic root of 558661 is about 82.3599583156.

The spelling of 558661 in words is "five hundred fifty-eight thousand, six hundred sixty-one".