6666829340779 has 2 divisors, whose sum is σ = 6666829340780. Its totient is φ = 6666829340778.

The previous prime is 6666829340777. The next prime is 6666829340917. The reversal of 6666829340779 is 9770439286666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6666829340779 - 2¹ = 6666829340777 is a prime.

It is a super-2 number, since 2×6666829340779² (a number of 26 digits) contains 22 as substring.

Together with 6666829340777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6666829340777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333414670389 + 3333414670390.

It is an arithmetic number, because the mean of its divisors is an integer number (3333414670390).

Almost surely, 2^{6666829340779} is an apocalyptic number.

6666829340779 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666829340779 is an equidigital number, since it uses as much as digits as its factorization.

6666829340779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987614208, while the sum is 73.

The spelling of 6666829340779 in words is "six trillion, six hundred sixty-six billion, eight hundred twenty-nine million, three hundred forty thousand, seven hundred seventy-nine".