206140266 has 72 divisors (see below), whose sum is σ = 489354372. Its totient is φ = 62496000.

The previous prime is 206140241. The next prime is 206140271. The reversal of 206140266 is 662041602.

It is a happy number.

206140266 is a `hidden beast` number, since 20 + 614 + 0 + 26 + 6 = 666.

206140266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 181845225 + 24295041 = 13485^2 + 4929^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 293716 + ... + 294416.

Almost surely, 2^206140266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206140266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244677186).

206140266 is an abundant number, since it is smaller than the sum of its proper divisors (283214106).

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

206140266 is a wasteful number, since it uses less digits than its factorization.

206140266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 754 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 206140266 is about 14357.5856605489. The cubic root of 206140266 is about 590.7280736881.

Adding to 206140266 its reverse (662041602), we get a palindrome (868181868).

The spelling of 206140266 in words is "two hundred six million, one hundred forty thousand, two hundred sixty-six".