6547522661 has 2 divisors, whose sum is σ = 6547522662. Its totient is φ = 6547522660.

The previous prime is 6547522603. The next prime is 6547522669. The reversal of 6547522661 is 1662257456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6543192100 + 4330561 = 80890^2 + 2081^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6547522661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6547522669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3273761330 + 3273761331.

It is an arithmetic number, because the mean of its divisors is an integer number (3273761331).

Almost surely, 2^6547522661 is an apocalyptic number.

It is an amenable number.

6547522661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6547522661 is an equidigital number, since it uses as much as digits as its factorization.

6547522661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 44.

The square root of 6547522661 is about 80916.7637822967. The cubic root of 6547522661 is about 1870.7927149946.

The spelling of 6547522661 in words is "six billion, five hundred forty-seven million, five hundred twenty-two thousand, six hundred sixty-one".