2663905639 has 2 divisors, whose sum is σ = 2663905640. Its totient is φ = 2663905638.

The previous prime is 2663905591. The next prime is 2663905649. The reversal of 2663905639 is 9365093662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2663905639 - 2³¹ = 516421991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2663905592 and 2663905601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2663905649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1331952819 + 1331952820.

It is an arithmetic number, because the mean of its divisors is an integer number (1331952820).

Almost surely, 2^2663905639 is an apocalyptic number.

2663905639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2663905639 is an equidigital number, since it uses as much as digits as its factorization.

2663905639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1574640, while the sum is 49.

The square root of 2663905639 is about 51613.0374905411. The cubic root of 2663905639 is about 1386.2437860132.

The spelling of 2663905639 in words is "two billion, six hundred sixty-three million, nine hundred five thousand, six hundred thirty-nine".