206661359 has 4 divisors (see below), whose sum is σ = 206690616. Its totient is φ = 206632104.

The previous prime is 206661319. The next prime is 206661383. The reversal of 206661359 is 953166602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 206661359 - 2¹² = 206657263 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 (206661319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3257 + ... + 20589.

It is an arithmetic number, because the mean of its divisors is an integer number (51672654).

Almost surely, 2^206661359 is an apocalyptic number.

206661359 is a deficient number, since it is larger than the sum of its proper divisors (29257).

206661359 is a wasteful number, since it uses less digits than its factorization.

206661359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29256.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 206661359 is about 14375.7211645190. The cubic root of 206661359 is about 591.2254134448.

The spelling of 206661359 in words is "two hundred six million, six hundred sixty-one thousand, three hundred fifty-nine".