667183345849 has 2 divisors, whose sum is σ = 667183345850. Its totient is φ = 667183345848.

The previous prime is 667183345847. The next prime is 667183345867. The reversal of 667183345849 is 948543381766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 664603213824 + 2580132025 = 815232^2 + 50795^2 .

It is a cyclic number.

It is not a de Polignac number, because 667183345849 - 2¹ = 667183345847 is a prime.

Together with 667183345847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (667183345847) 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, 333591672924 + 333591672925.

It is an arithmetic number, because the mean of its divisors is an integer number (333591672925).

Almost surely, 2^667183345849 is an apocalyptic number.

It is an amenable number.

667183345849 is a deficient number, since it is larger than the sum of its proper divisors (1).

667183345849 is an equidigital number, since it uses as much as digits as its factorization.

667183345849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104509440, while the sum is 64.

The spelling of 667183345849 in words is "six hundred sixty-seven billion, one hundred eighty-three million, three hundred forty-five thousand, eight hundred forty-nine".