7266065561 has 2 divisors, whose sum is σ = 7266065562. Its totient is φ = 7266065560.

The previous prime is 7266065531. The next prime is 7266065563. The reversal of 7266065561 is 1655606627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6234049936 + 1032015625 = 78956^2 + 32125^2 .

It is a cyclic number.

It is not a de Polignac number, because 7266065561 - 2⁶ = 7266065497 is a prime.

Together with 7266065563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7266065563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3633032780 + 3633032781.

It is an arithmetic number, because the mean of its divisors is an integer number (3633032781).

Almost surely, 2^7266065561 is an apocalyptic number.

It is an amenable number.

7266065561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7266065561 is an equidigital number, since it uses as much as digits as its factorization.

7266065561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 7266065561 is about 85241.2198469731. The cubic root of 7266065561 is about 1936.8668703474.

The spelling of 7266065561 in words is "seven billion, two hundred sixty-six million, sixty-five thousand, five hundred sixty-one".