2646661417 has 2 divisors, whose sum is σ = 2646661418. Its totient is φ = 2646661416.

The previous prime is 2646661399. The next prime is 2646661517. The reversal of 2646661417 is 7141666462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2521646656 + 125014761 = 50216^2 + 11181^2 .

It is a cyclic number.

It is not a de Polignac number, because 2646661417 - 2¹¹ = 2646659369 is a prime.

It is not a weakly prime, because it can be changed into another prime (2646661517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323330708 + 1323330709.

It is an arithmetic number, because the mean of its divisors is an integer number (1323330709).

Almost surely, 2^2646661417 is an apocalyptic number.

It is an amenable number.

2646661417 is a deficient number, since it is larger than the sum of its proper divisors (1).

2646661417 is an equidigital number, since it uses as much as digits as its factorization.

2646661417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 43.

The square root of 2646661417 is about 51445.7133005268. The cubic root of 2646661417 is about 1383.2461244614.

The spelling of 2646661417 in words is "two billion, six hundred forty-six million, six hundred sixty-one thousand, four hundred seventeen".