6556525009 has 2 divisors, whose sum is σ = 6556525010. Its totient is φ = 6556525008.

The previous prime is 6556524967. The next prime is 6556525057. The reversal of 6556525009 is 9005256556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5222230225 + 1334294784 = 72265^2 + 36528^2 .

It is a cyclic number.

It is not a de Polignac number, because 6556525009 - 2¹¹ = 6556522961 is a prime.

It is not a weakly prime, because it can be changed into another prime (6556525309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3278262504 + 3278262505.

It is an arithmetic number, because the mean of its divisors is an integer number (3278262505).

Almost surely, 2^6556525009 is an apocalyptic number.

It is an amenable number.

6556525009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6556525009 is an equidigital number, since it uses as much as digits as its factorization.

6556525009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405000, while the sum is 43.

The square root of 6556525009 is about 80972.3718869591. The cubic root of 6556525009 is about 1871.6497217950.

The spelling of 6556525009 in words is "six billion, five hundred fifty-six million, five hundred twenty-five thousand, nine".