65558461 has 2 divisors, whose sum is σ = 65558462. Its totient is φ = 65558460.

The previous prime is 65558431. The next prime is 65558483. The reversal of 65558461 is 16485556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65205625 + 352836 = 8075^2 + 594^2 .

It is a cyclic number.

It is not a de Polignac number, because 65558461 - 2⁵ = 65558429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65558401) 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, 32779230 + 32779231.

It is an arithmetic number, because the mean of its divisors is an integer number (32779231).

Almost surely, 2^65558461 is an apocalyptic number.

It is an amenable number.

65558461 is a deficient number, since it is larger than the sum of its proper divisors (1).

65558461 is an equidigital number, since it uses as much as digits as its factorization.

65558461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144000, while the sum is 40.

The square root of 65558461 is about 8096.8179552217. The cubic root of 65558461 is about 403.2207904168.

The spelling of 65558461 in words is "sixty-five million, five hundred fifty-eight thousand, four hundred sixty-one".