206566055 has 4 divisors (see below), whose sum is σ = 247879272. Its totient is φ = 165252840.

The previous prime is 206566033. The next prime is 206566057. The reversal of 206566055 is 550665602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 206566055 - 2¹⁶ = 206500519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206566057) 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 in 3 ways as a sum of consecutive naturals, for example, 20656601 + ... + 20656610.

It is an arithmetic number, because the mean of its divisors is an integer number (61969818).

Almost surely, 2^206566055 is an apocalyptic number.

206566055 is a deficient number, since it is larger than the sum of its proper divisors (41313217).

206566055 is an equidigital number, since it uses as much as digits as its factorization.

206566055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41313216.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 206566055 is about 14372.4060268279. The cubic root of 206566055 is about 591.1345162546.

The spelling of 206566055 in words is "two hundred six million, five hundred sixty-six thousand, fifty-five".