7182666521 has 2 divisors, whose sum is σ = 7182666522. Its totient is φ = 7182666520.

The previous prime is 7182666503. The next prime is 7182666559. The reversal of 7182666521 is 1256662817.

7182666521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6932394121 + 250272400 = 83261^2 + 15820^2 .

It is an emirp because it is prime and its reverse (1256662817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7182666521 - 2⁶ = 7182666457 is a prime.

It is not a weakly prime, because it can be changed into another prime (7184666521) 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, 3591333260 + 3591333261.

It is an arithmetic number, because the mean of its divisors is an integer number (3591333261).

Almost surely, 2^7182666521 is an apocalyptic number.

It is an amenable number.

7182666521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7182666521 is an equidigital number, since it uses as much as digits as its factorization.

7182666521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 7182666521 is about 84750.6136909934. The cubic root of 7182666521 is about 1929.4279601715.

The spelling of 7182666521 in words is "seven billion, one hundred eighty-two million, six hundred sixty-six thousand, five hundred twenty-one".