206635042266 has 16 divisors (see below), whose sum is σ = 413282815488. Its totient is φ = 68876225600.

The previous prime is 206635042261. The next prime is 206635042319. The reversal of 206635042266 is 662240536602.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (206635042261) 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, 312570 + ... + 714821.

It is an arithmetic number, because the mean of its divisors is an integer number (25830175968).

Almost surely, 2^206635042266 is an apocalyptic number.

206635042266 is an abundant number, since it is smaller than the sum of its proper divisors (206647773222).

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

206635042266 is a wasteful number, since it uses less digits than its factorization.

206635042266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060917.

The product of its (nonzero) digits is 622080, while the sum is 42.

Adding to 206635042266 its reverse (662240536602), we get a palindrome (868875578868).

The spelling of 206635042266 in words is "two hundred six billion, six hundred thirty-five million, forty-two thousand, two hundred sixty-six".