604666561 has 2 divisors, whose sum is σ = 604666562. Its totient is φ = 604666560.

The previous prime is 604666549. The next prime is 604666567. The reversal of 604666561 is 165666406.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478778161 + 125888400 = 21881^2 + 11220^2 .

It is a cyclic number.

It is not a de Polignac number, because 604666561 - 2⁵ = 604666529 is a prime.

It is not a weakly prime, because it can be changed into another prime (604666567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302333280 + 302333281.

It is an arithmetic number, because the mean of its divisors is an integer number (302333281).

Almost surely, 2^604666561 is an apocalyptic number.

It is an amenable number.

604666561 is a deficient number, since it is larger than the sum of its proper divisors (1).

604666561 is an equidigital number, since it uses as much as digits as its factorization.

604666561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 604666561 is about 24589.9687067715. The cubic root of 604666561 is about 845.6136485314.

The spelling of 604666561 in words is "six hundred four million, six hundred sixty-six thousand, five hundred sixty-one".