6666880943 has 2 divisors, whose sum is σ = 6666880944. Its totient is φ = 6666880942.

The previous prime is 6666880937. The next prime is 6666881009. The reversal of 6666880943 is 3490886666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6666880943 - 2¹² = 6666876847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6666880343) 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 as a sum of consecutive naturals, namely, 3333440471 + 3333440472.

It is an arithmetic number, because the mean of its divisors is an integer number (3333440472).

Almost surely, 2^6666880943 is an apocalyptic number.

6666880943 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666880943 is an equidigital number, since it uses as much as digits as its factorization.

6666880943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8957952, while the sum is 56.

The square root of 6666880943 is about 81650.9702514306. The cubic root of 6666880943 is about 1882.0922217210.

The spelling of 6666880943 in words is "six billion, six hundred sixty-six million, eight hundred eighty thousand, nine hundred forty-three".