666666658278059 has 2 divisors, whose sum is σ = 666666658278060. Its totient is φ = 666666658278058.

The previous prime is 666666658278029. The next prime is 666666658278169. The reversal of 666666658278059 is 950872856666666.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666666658278059 is a prime.

It is not a weakly prime, because it can be changed into another prime (666666658278029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333333329139029 + 333333329139030.

It is an arithmetic number, because the mean of its divisors is an integer number (333333329139030).

Almost surely, 2^{666666658278059} is an apocalyptic number.

666666658278059 is a deficient number, since it is larger than the sum of its proper divisors (1).

666666658278059 is an equidigital number, since it uses as much as digits as its factorization.

666666658278059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56435097600, while the sum is 86.

The spelling of 666666658278059 in words is "six hundred sixty-six trillion, six hundred sixty-six billion, six hundred fifty-eight million, two hundred seventy-eight thousand, fifty-nine".