786562680661 has 2 divisors, whose sum is σ = 786562680662. Its totient is φ = 786562680660.

The previous prime is 786562680611. The next prime is 786562680667. The reversal of 786562680661 is 166086265687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530697680100 + 255865000561 = 728490^2 + 505831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-786562680661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 786562680661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (786562680667) 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, 393281340330 + 393281340331.

It is an arithmetic number, because the mean of its divisors is an integer number (393281340331).

Almost surely, 2^786562680661 is an apocalyptic number.

It is an amenable number.

786562680661 is a deficient number, since it is larger than the sum of its proper divisors (1).

786562680661 is an equidigital number, since it uses as much as digits as its factorization.

786562680661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34836480, while the sum is 61.

The spelling of 786562680661 in words is "seven hundred eighty-six billion, five hundred sixty-two million, six hundred eighty thousand, six hundred sixty-one".