777696969697 has 8 divisors (see below), whose sum is σ = 785434539240. Its totient is φ = 769960137600.

The previous prime is 777696969691. The next prime is 777696969733. The reversal of 777696969697 is 796969696777.

It can be written as a sum of positive squares in 4 ways, for example, as 106213417216 + 671483552481 = 325904^2 + 819441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-777696969697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (777696969691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2071933 + ... + 2418325.

It is an arithmetic number, because the mean of its divisors is an integer number (98179317405).

Almost surely, 2^777696969697 is an apocalyptic number.

It is an amenable number.

777696969697 is a deficient number, since it is larger than the sum of its proper divisors (7737569543).

777696969697 is a wasteful number, since it uses less digits than its factorization.

777696969697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368723.

The product of its digits is 20415837456, while the sum is 88.

The spelling of 777696969697 in words is "seven hundred seventy-seven billion, six hundred ninety-six million, nine hundred sixty-nine thousand, six hundred ninety-seven".