709486666661 has 2 divisors, whose sum is σ = 709486666662. Its totient is φ = 709486666660.

The previous prime is 709486666639. The next prime is 709486666699. The reversal of 709486666661 is 166666684907.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 532270925761 + 177215740900 = 729569^2 + 420970^2 .

It is an emirp because it is prime and its reverse (166666684907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 709486666661 - 2¹⁴ = 709486650277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (709486266661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354743333330 + 354743333331.

It is an arithmetic number, because the mean of its divisors is an integer number (354743333331).

Almost surely, 2^709486666661 is an apocalyptic number.

It is an amenable number.

709486666661 is a deficient number, since it is larger than the sum of its proper divisors (1).

709486666661 is an equidigital number, since it uses as much as digits as its factorization.

709486666661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94058496, while the sum is 65.

The spelling of 709486666661 in words is "seven hundred nine billion, four hundred eighty-six million, six hundred sixty-six thousand, six hundred sixty-one".