206740566 has 32 divisors (see below), whose sum is σ = 461242080. Its totient is φ = 68640768.

The previous prime is 206740531. The next prime is 206740579. The reversal of 206740566 is 665047602.

206740566 is a `hidden beast` number, since 20 + 6 + 74 + 0 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 206740566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6430 + ... + 21326.

It is an arithmetic number, because the mean of its divisors is an integer number (14413815).

Almost surely, 2^206740566 is an apocalyptic number.

206740566 is an abundant number, since it is smaller than the sum of its proper divisors (254501514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206740566 is a wasteful number, since it uses less digits than its factorization.

206740566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15165 (or 15159 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 206740566 is about 14378.4757884833. The cubic root of 206740566 is about 591.3009366906.

The spelling of 206740566 in words is "two hundred six million, seven hundred forty thousand, five hundred sixty-six".