6666641137087 has 2 divisors, whose sum is σ = 6666641137088. Its totient is φ = 6666641137086.

The previous prime is 6666641137081. The next prime is 6666641137139. The reversal of 6666641137087 is 7807311466666.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6666641137087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6666641137081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333320568543 + 3333320568544.

It is an arithmetic number, because the mean of its divisors is an integer number (3333320568544).

Almost surely, 2^{6666641137087} is an apocalyptic number.

6666641137087 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666641137087 is an equidigital number, since it uses as much as digits as its factorization.

6666641137087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36578304, while the sum is 61.

The spelling of 6666641137087 in words is "six trillion, six hundred sixty-six billion, six hundred forty-one million, one hundred thirty-seven thousand, eighty-seven".