2605661711 has 2 divisors, whose sum is σ = 2605661712. Its totient is φ = 2605661710.

The previous prime is 2605661671. The next prime is 2605661719. The reversal of 2605661711 is 1171665062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2605661711 - 2²⁶ = 2538552847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2605661719) 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, 1302830855 + 1302830856.

It is an arithmetic number, because the mean of its divisors is an integer number (1302830856).

Almost surely, 2^2605661711 is an apocalyptic number.

2605661711 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605661711 is an equidigital number, since it uses as much as digits as its factorization.

2605661711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 2605661711 is about 51045.6825892259. The cubic root of 2605661711 is about 1376.0662514790.

The spelling of 2605661711 in words is "two billion, six hundred five million, six hundred sixty-one thousand, seven hundred eleven".