7666606513 has 2 divisors, whose sum is σ = 7666606514. Its totient is φ = 7666606512.

The previous prime is 7666606481. The next prime is 7666606567. The reversal of 7666606513 is 3156066667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4787532864 + 2879073649 = 69192^2 + 53657^2 .

It is a cyclic number.

It is not a de Polignac number, because 7666606513 - 2⁵ = 7666606481 is a prime.

It is not a weakly prime, because it can be changed into another prime (7666606613) 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, 3833303256 + 3833303257.

It is an arithmetic number, because the mean of its divisors is an integer number (3833303257).

Almost surely, 2^7666606513 is an apocalyptic number.

It is an amenable number.

7666606513 is a deficient number, since it is larger than the sum of its proper divisors (1).

7666606513 is an equidigital number, since it uses as much as digits as its factorization.

7666606513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 46.

The square root of 7666606513 is about 87559.1600747746. The cubic root of 7666606513 is about 1971.8220761489.

The spelling of 7666606513 in words is "seven billion, six hundred sixty-six million, six hundred six thousand, five hundred thirteen".