2566165489 has 2 divisors, whose sum is σ = 2566165490. Its totient is φ = 2566165488.

The previous prime is 2566165439. The next prime is 2566165541. The reversal of 2566165489 is 9845616652.

It is an a-pointer prime, because the next prime (2566165541) can be obtained adding 2566165489 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1653642225 + 912523264 = 40665^2 + 30208^2 .

It is a cyclic number.

It is not a de Polignac number, because 2566165489 - 2¹⁹ = 2565641201 is a prime.

It is not a weakly prime, because it can be changed into another prime (2566165439) 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, 1283082744 + 1283082745.

It is an arithmetic number, because the mean of its divisors is an integer number (1283082745).

Almost surely, 2^2566165489 is an apocalyptic number.

It is an amenable number.

2566165489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566165489 is an equidigital number, since it uses as much as digits as its factorization.

2566165489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3110400, while the sum is 52.

The square root of 2566165489 is about 50657.3340099931. The cubic root of 2566165489 is about 1369.0780891566.

The spelling of 2566165489 in words is "two billion, five hundred sixty-six million, one hundred sixty-five thousand, four hundred eighty-nine".