678900066769 has 2 divisors, whose sum is σ = 678900066770. Its totient is φ = 678900066768.

The previous prime is 678900066709. The next prime is 678900066829. The reversal of 678900066769 is 967660009876.

It is a balanced prime because it is at equal distance from previous prime (678900066709) and next prime (678900066829).

It can be written as a sum of positive squares in only one way, i.e., 611112737169 + 67787329600 = 781737^2 + 260360^2 .

It is a cyclic number.

It is not a de Polignac number, because 678900066769 - 2⁷ = 678900066641 is a prime.

It is a super-2 number, since 2×678900066769² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 678900066769.

It is not a weakly prime, because it can be changed into another prime (678900066709) 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, 339450033384 + 339450033385.

It is an arithmetic number, because the mean of its divisors is an integer number (339450033385).

Almost surely, 2^678900066769 is an apocalyptic number.

It is an amenable number.

678900066769 is a deficient number, since it is larger than the sum of its proper divisors (1).

678900066769 is an equidigital number, since it uses as much as digits as its factorization.

678900066769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41150592, while the sum is 64.

The spelling of 678900066769 in words is "six hundred seventy-eight billion, nine hundred million, sixty-six thousand, seven hundred sixty-nine".