2566331641 has 2 divisors, whose sum is σ = 2566331642. Its totient is φ = 2566331640.

The previous prime is 2566331627. The next prime is 2566331687. The reversal of 2566331641 is 1461336652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1308920041 + 1257411600 = 36179^2 + 35460^2 .

It is a cyclic number.

It is not a de Polignac number, because 2566331641 - 2⁵ = 2566331609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2566331641.

It is not a weakly prime, because it can be changed into another prime (2566371641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283165820 + 1283165821.

It is an arithmetic number, because the mean of its divisors is an integer number (1283165821).

Almost surely, 2^2566331641 is an apocalyptic number.

It is an amenable number.

2566331641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566331641 is an equidigital number, since it uses as much as digits as its factorization.

2566331641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 37.

The square root of 2566331641 is about 50658.9739434189. The cubic root of 2566331641 is about 1369.1076365045.

The spelling of 2566331641 in words is "two billion, five hundred sixty-six million, three hundred thirty-one thousand, six hundred forty-one".