206668542 has 8 divisors (see below), whose sum is σ = 413337096. Its totient is φ = 68889512.

The previous prime is 206668531. The next prime is 206668543. The reversal of 206668542 is 245866602.

206668542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

206668542 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 206668542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206668543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17222373 + ... + 17222384.

It is an arithmetic number, because the mean of its divisors is an integer number (51667137).

Almost surely, 2^206668542 is an apocalyptic number.

206668542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

206668542 is a wasteful number, since it uses less digits than its factorization.

206668542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34444762.

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 206668542 is about 14375.9709932929. The cubic root of 206668542 is about 591.2322631739.

The spelling of 206668542 in words is "two hundred six million, six hundred sixty-eight thousand, five hundred forty-two".