205666226 has 8 divisors (see below), whose sum is σ = 308617884. Its totient is φ = 102793600.

The previous prime is 205666217. The next prime is 205666229. The reversal of 205666226 is 622666502.

It can be written as a sum of positive squares in 2 ways, for example, as 197262025 + 8404201 = 14045^2 + 2899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (205666229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12755 + ... + 23958.

Almost surely, 2^205666226 is an apocalyptic number.

205666226 is a deficient number, since it is larger than the sum of its proper divisors (102951658).

205666226 is a wasteful number, since it uses less digits than its factorization.

205666226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39516.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 205666226 is about 14341.0678124050. The cubic root of 205666226 is about 590.2749135374.

The spelling of 205666226 in words is "two hundred five million, six hundred sixty-six thousand, two hundred twenty-six".