2805666641 has 2 divisors, whose sum is σ = 2805666642. Its totient is φ = 2805666640.

The previous prime is 2805666637. The next prime is 2805666667. The reversal of 2805666641 is 1466665082.

2805666641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2410810000 + 394856641 = 49100^2 + 19871^2 .

It is a cyclic number.

It is not a de Polignac number, because 2805666641 - 2² = 2805666637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2805666592 and 2805666601.

It is not a weakly prime, because it can be changed into another prime (2805662641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402833320 + 1402833321.

It is an arithmetic number, because the mean of its divisors is an integer number (1402833321).

Almost surely, 2^2805666641 is an apocalyptic number.

It is an amenable number.

2805666641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2805666641 is an equidigital number, since it uses as much as digits as its factorization.

2805666641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 2805666641 is about 52968.5438821948. The cubic root of 2805666641 is about 1410.4099274215.

The spelling of 2805666641 in words is "two billion, eight hundred five million, six hundred sixty-six thousand, six hundred forty-one".