206668870 has 32 divisors (see below), whose sum is σ = 385648128. Its totient is φ = 79688928.

The previous prime is 206668843. The next prime is 206668873. The reversal of 206668870 is 78866602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206668873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28209 + ... + 34771.

It is an arithmetic number, because the mean of its divisors is an integer number (12051504).

Almost surely, 2^206668870 is an apocalyptic number.

206668870 is a deficient number, since it is larger than the sum of its proper divisors (178979258).

206668870 is a wasteful number, since it uses less digits than its factorization.

206668870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6684.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 206668870 is about 14375.9824012135. The cubic root of 206668870 is about 591.2325759518.

The spelling of 206668870 in words is "two hundred six million, six hundred sixty-eight thousand, eight hundred seventy".