6656276655439 has 2 divisors, whose sum is σ = 6656276655440. Its totient is φ = 6656276655438.

The previous prime is 6656276655433. The next prime is 6656276655499. The reversal of 6656276655439 is 9345566726566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6656276655439 - 2⁹ = 6656276654927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6656276655433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328138327719 + 3328138327720.

It is an arithmetic number, because the mean of its divisors is an integer number (3328138327720).

Almost surely, 2^{6656276655439} is an apocalyptic number.

6656276655439 is a deficient number, since it is larger than the sum of its proper divisors (1).

6656276655439 is an equidigital number, since it uses as much as digits as its factorization.

6656276655439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664000, while the sum is 70.

The spelling of 6656276655439 in words is "six trillion, six hundred fifty-six billion, two hundred seventy-six million, six hundred fifty-five thousand, four hundred thirty-nine".