2266616861 has 2 divisors, whose sum is σ = 2266616862. Its totient is φ = 2266616860.

The previous prime is 2266616843. The next prime is 2266616917. The reversal of 2266616861 is 1686166622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2265188836 + 1428025 = 47594^2 + 1195^2 .

It is a cyclic number.

It is not a de Polignac number, because 2266616861 - 2⁶ = 2266616797 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 (2266616461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1133308430 + 1133308431.

It is an arithmetic number, because the mean of its divisors is an integer number (1133308431).

Almost surely, 2^2266616861 is an apocalyptic number.

It is an amenable number.

2266616861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2266616861 is an equidigital number, since it uses as much as digits as its factorization.

2266616861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 44.

The square root of 2266616861 is about 47608.9997899557. Note that the first 3 decimals coincide. The cubic root of 2266616861 is about 1313.5886028338.

The spelling of 2266616861 in words is "two billion, two hundred sixty-six million, six hundred sixteen thousand, eight hundred sixty-one".