557566661653 has 2 divisors, whose sum is σ = 557566661654. Its totient is φ = 557566661652.

The previous prime is 557566661609. The next prime is 557566661677. The reversal of 557566661653 is 356166665755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 349450046449 + 208116615204 = 591143^2 + 456198^2 .

It is a cyclic number.

It is not a de Polignac number, because 557566661653 - 2²⁹ = 557029790741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 557566661591 and 557566661600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557566661053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278783330826 + 278783330827.

It is an arithmetic number, because the mean of its divisors is an integer number (278783330827).

Almost surely, 2^557566661653 is an apocalyptic number.

It is an amenable number.

557566661653 is a deficient number, since it is larger than the sum of its proper divisors (1).

557566661653 is an equidigital number, since it uses as much as digits as its factorization.

557566661653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060000, while the sum is 61.

The spelling of 557566661653 in words is "five hundred fifty-seven billion, five hundred sixty-six million, six hundred sixty-one thousand, six hundred fifty-three".