205041661 has 8 divisors (see below), whose sum is σ = 223832448. Its totient is φ = 186276000.

The previous prime is 205041647. The next prime is 205041667. The reversal of 205041661 is 166140502.

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

It is a cyclic number.

It is not a de Polignac number, because 205041661 - 2¹¹ = 205039613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205041667) 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, 13516 + ... + 24346.

It is an arithmetic number, because the mean of its divisors is an integer number (27979056).

Almost surely, 2^205041661 is an apocalyptic number.

It is an amenable number.

205041661 is a deficient number, since it is larger than the sum of its proper divisors (18790787).

205041661 is a wasteful number, since it uses less digits than its factorization.

205041661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12563.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 205041661 is about 14319.2758545954. The cubic root of 205041661 is about 589.6767941549.

The spelling of 205041661 in words is "two hundred five million, forty-one thousand, six hundred sixty-one".