676638842881 has 2 divisors, whose sum is σ = 676638842882. Its totient is φ = 676638842880.

The previous prime is 676638842843. The next prime is 676638842911. The reversal of 676638842881 is 188248836676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 491983002225 + 184655840656 = 701415^2 + 429716^2 .

It is a cyclic number.

It is not a de Polignac number, because 676638842881 - 2⁷ = 676638842753 is a prime.

It is a super-2 number, since 2×676638842881² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (676638842281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338319421440 + 338319421441.

It is an arithmetic number, because the mean of its divisors is an integer number (338319421441).

Almost surely, 2^676638842881 is an apocalyptic number.

It is an amenable number.

676638842881 is a deficient number, since it is larger than the sum of its proper divisors (1).

676638842881 is an equidigital number, since it uses as much as digits as its factorization.

676638842881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148635648, while the sum is 67.

The spelling of 676638842881 in words is "six hundred seventy-six billion, six hundred thirty-eight million, eight hundred forty-two thousand, eight hundred eighty-one".