206666230493 has 2 divisors, whose sum is σ = 206666230494. Its totient is φ = 206666230492.

The previous prime is 206666230427. The next prime is 206666230543. The reversal of 206666230493 is 394032666602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179527621849 + 27138608644 = 423707^2 + 164738^2 .

It is a cyclic number.

It is not a de Polignac number, because 206666230493 - 2¹² = 206666226397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206666230403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103333115246 + 103333115247.

It is an arithmetic number, because the mean of its divisors is an integer number (103333115247).

Almost surely, 2^206666230493 is an apocalyptic number.

It is an amenable number.

206666230493 is a deficient number, since it is larger than the sum of its proper divisors (1).

206666230493 is an equidigital number, since it uses as much as digits as its factorization.

206666230493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 47.

The spelling of 206666230493 in words is "two hundred six billion, six hundred sixty-six million, two hundred thirty thousand, four hundred ninety-three".