667210550197 has 2 divisors, whose sum is σ = 667210550198. Its totient is φ = 667210550196.

The previous prime is 667210550161. The next prime is 667210550221. The reversal of 667210550197 is 791055012766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553080765636 + 114129784561 = 743694^2 + 337831^2 .

It is a cyclic number.

It is not a de Polignac number, because 667210550197 - 2¹⁵ = 667210517429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667210550197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667210550107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333605275098 + 333605275099.

It is an arithmetic number, because the mean of its divisors is an integer number (333605275099).

Almost surely, 2^667210550197 is an apocalyptic number.

It is an amenable number.

667210550197 is a deficient number, since it is larger than the sum of its proper divisors (1).

667210550197 is an equidigital number, since it uses as much as digits as its factorization.

667210550197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 793800, while the sum is 49.

The spelling of 667210550197 in words is "six hundred sixty-seven billion, two hundred ten million, five hundred fifty thousand, one hundred ninety-seven".