6520767817427 has 2 divisors, whose sum is σ = 6520767817428. Its totient is φ = 6520767817426.

The previous prime is 6520767817411. The next prime is 6520767817511. The reversal of 6520767817427 is 7247187670256.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6520767817427 - 2⁴ = 6520767817411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6520767817427.

It is not a weakly prime, because it can be changed into another prime (6520767817327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260383908713 + 3260383908714.

It is an arithmetic number, because the mean of its divisors is an integer number (3260383908714).

Almost surely, 2^{6520767817427} is an apocalyptic number.

6520767817427 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520767817427 is an equidigital number, since it uses as much as digits as its factorization.

6520767817427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55319040, while the sum is 62.

The spelling of 6520767817427 in words is "six trillion, five hundred twenty billion, seven hundred sixty-seven million, eight hundred seventeen thousand, four hundred twenty-seven".