679335718181 has 2 divisors, whose sum is σ = 679335718182. Its totient is φ = 679335718180.

The previous prime is 679335718153. The next prime is 679335718189. The reversal of 679335718181 is 181817533976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 649581193156 + 29754525025 = 805966^2 + 172495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679335718181 is a prime.

It is a super-2 number, since 2×679335718181² (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 679335718181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679335718189) 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, 339667859090 + 339667859091.

It is an arithmetic number, because the mean of its divisors is an integer number (339667859091).

Almost surely, 2^679335718181 is an apocalyptic number.

It is an amenable number.

679335718181 is a deficient number, since it is larger than the sum of its proper divisors (1).

679335718181 is an equidigital number, since it uses as much as digits as its factorization.

679335718181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 59.

The spelling of 679335718181 in words is "six hundred seventy-nine billion, three hundred thirty-five million, seven hundred eighteen thousand, one hundred eighty-one".