9776656566779 has 2 divisors, whose sum is σ = 9776656566780. Its totient is φ = 9776656566778.

The previous prime is 9776656566757. The next prime is 9776656566799.

9776656566779 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9776656566779 is a prime.

It is a super-4 number, since 4×9776656566779⁴ (a number of 53 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9776656566779.

It is not a weakly prime, because it can be changed into another prime (9776656566709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4888328283389 + 4888328283390.

It is an arithmetic number, because the mean of its divisors is an integer number (4888328283390).

Almost surely, 2^{9776656566779} is an apocalyptic number.

9776656566779 is a deficient number, since it is larger than the sum of its proper divisors (1).

9776656566779 is an equidigital number, since it uses as much as digits as its factorization.

9776656566779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37807106400, while the sum is 86.

The spelling of 9776656566779 in words is "nine trillion, seven hundred seventy-six billion, six hundred fifty-six million, five hundred sixty-six thousand, seven hundred seventy-nine".