2566214621 has 2 divisors, whose sum is σ = 2566214622. Its totient is φ = 2566214620.

The previous prime is 2566214603. The next prime is 2566214663. The reversal of 2566214621 is 1264126652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1698264100 + 867950521 = 41210^2 + 29461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2566214621 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2566214921) 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, 1283107310 + 1283107311.

It is an arithmetic number, because the mean of its divisors is an integer number (1283107311).

Almost surely, 2^2566214621 is an apocalyptic number.

It is an amenable number.

2566214621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566214621 is an equidigital number, since it uses as much as digits as its factorization.

2566214621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 35.

The square root of 2566214621 is about 50657.8189522605. The cubic root of 2566214621 is about 1369.0868265920.

The spelling of 2566214621 in words is "two billion, five hundred sixty-six million, two hundred fourteen thousand, six hundred twenty-one".