206866683469 has 2 divisors, whose sum is σ = 206866683470. Its totient is φ = 206866683468.

The previous prime is 206866683349. The next prime is 206866683479. The reversal of 206866683469 is 964386668602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104170790025 + 102695893444 = 322755^2 + 320462^2 .

It is a cyclic number.

It is not a de Polignac number, because 206866683469 - 2⁷ = 206866683341 is a prime.

It is a super-3 number, since 3×206866683469³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 206866683469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206866683479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103433341734 + 103433341735.

It is an arithmetic number, because the mean of its divisors is an integer number (103433341735).

Almost surely, 2^206866683469 is an apocalyptic number.

It is an amenable number.

206866683469 is a deficient number, since it is larger than the sum of its proper divisors (1).

206866683469 is an equidigital number, since it uses as much as digits as its factorization.

206866683469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107495424, while the sum is 64.

The spelling of 206866683469 in words is "two hundred six billion, eight hundred sixty-six million, six hundred eighty-three thousand, four hundred sixty-nine".