667216045871 has 2 divisors, whose sum is σ = 667216045872. Its totient is φ = 667216045870.

The previous prime is 667216045789. The next prime is 667216045897. The reversal of 667216045871 is 178540612766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667216045871 - 2¹⁸ = 667215783727 is a prime.

It is a super-2 number, since 2×667216045871² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667216047871) 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, 333608022935 + 333608022936.

It is an arithmetic number, because the mean of its divisors is an integer number (333608022936).

Almost surely, 2^667216045871 is an apocalyptic number.

667216045871 is a deficient number, since it is larger than the sum of its proper divisors (1).

667216045871 is an equidigital number, since it uses as much as digits as its factorization.

667216045871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 667216045871 in words is "six hundred sixty-seven billion, two hundred sixteen million, forty-five thousand, eight hundred seventy-one".