7666007660609 has 2 divisors, whose sum is σ = 7666007660610. Its totient is φ = 7666007660608.

The previous prime is 7666007660573. The next prime is 7666007660617. The reversal of 7666007660609 is 9060667006667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7568947373584 + 97060287025 = 2751172^2 + 311545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7666007660609 is a prime.

It is not a weakly prime, because it can be changed into another prime (7666007660209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3833003830304 + 3833003830305.

It is an arithmetic number, because the mean of its divisors is an integer number (3833003830305).

Almost surely, 2^{7666007660609} is an apocalyptic number.

It is an amenable number.

7666007660609 is a deficient number, since it is larger than the sum of its proper divisors (1).

7666007660609 is an equidigital number, since it uses as much as digits as its factorization.

7666007660609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20575296, while the sum is 59.

The spelling of 7666007660609 in words is "seven trillion, six hundred sixty-six billion, seven million, six hundred sixty thousand, six hundred nine".