206165868 has 24 divisors (see below), whose sum is σ = 509351472. Its totient is φ = 64679424.

The previous prime is 206165867. The next prime is 206165893. The reversal of 206165868 is 868561602.

It is not an unprimeable number, because it can be changed into a prime (206165863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505105 + ... + 505512.

It is an arithmetic number, because the mean of its divisors is an integer number (21222978).

Almost surely, 2^206165868 is an apocalyptic number.

It is an amenable number.

206165868 is an abundant number, since it is smaller than the sum of its proper divisors (303185604).

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

206165868 is a wasteful number, since it uses less digits than its factorization.

206165868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010641 (or 1010639 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 206165868 is about 14358.4772173096. The cubic root of 206165868 is about 590.7525282247.

The spelling of 206165868 in words is "two hundred six million, one hundred sixty-five thousand, eight hundred sixty-eight".