7666235211709 has 2 divisors, whose sum is σ = 7666235211710. Its totient is φ = 7666235211708.

The previous prime is 7666235211653. The next prime is 7666235211799. The reversal of 7666235211709 is 9071125326667.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4973836644100 + 2692398567609 = 2230210^2 + 1640853^2 .

It is a cyclic number.

It is not a de Polignac number, because 7666235211709 - 2¹⁵ = 7666235178941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7666235211709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7666235211799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3833117605854 + 3833117605855.

It is an arithmetic number, because the mean of its divisors is an integer number (3833117605855).

Almost surely, 2^{7666235211709} is an apocalyptic number.

It is an amenable number.

7666235211709 is a deficient number, since it is larger than the sum of its proper divisors (1).

7666235211709 is an equidigital number, since it uses as much as digits as its factorization.

7666235211709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 7666235211709 in words is "seven trillion, six hundred sixty-six billion, two hundred thirty-five million, two hundred eleven thousand, seven hundred nine".