205261166 has 8 divisors (see below), whose sum is σ = 335881944. Its totient is φ = 93300520.

The previous prime is 205261153. The next prime is 205261169. The reversal of 205261166 is 661162502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205261169) 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, 4665005 + ... + 4665048.

It is an arithmetic number, because the mean of its divisors is an integer number (41985243).

Almost surely, 2^205261166 is an apocalyptic number.

205261166 is a deficient number, since it is larger than the sum of its proper divisors (130620778).

205261166 is a wasteful number, since it uses less digits than its factorization.

205261166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9330066.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 205261166 is about 14326.9384726815. The cubic root of 205261166 is about 589.8871430216.

The spelling of 205261166 in words is "two hundred five million, two hundred sixty-one thousand, one hundred sixty-six".