206641406 has 16 divisors (see below), whose sum is σ = 314677440. Its totient is φ = 101755680.

The previous prime is 206641403. The next prime is 206641417. The reversal of 206641406 is 604146602.

206641406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206641403) 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, 71420 + ... + 74256.

It is an arithmetic number, because the mean of its divisors is an integer number (19667340).

Almost surely, 2^206641406 is an apocalyptic number.

206641406 is a deficient number, since it is larger than the sum of its proper divisors (108036034).

206641406 is a wasteful number, since it uses less digits than its factorization.

206641406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 206641406 is about 14375.0271651917. The cubic root of 206641406 is about 591.2063853749.

The spelling of 206641406 in words is "two hundred six million, six hundred forty-one thousand, four hundred six".