206141661 has 24 divisors (see below), whose sum is σ = 335312640. Its totient is φ = 120902400.

The previous prime is 206141653. The next prime is 206141687. The reversal of 206141661 is 166141602.

It is not a de Polignac number, because 206141661 - 2³ = 206141653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206143661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30516 + ... + 36653.

It is an arithmetic number, because the mean of its divisors is an integer number (13971360).

Almost surely, 2^206141661 is an apocalyptic number.

It is an amenable number.

206141661 is a deficient number, since it is larger than the sum of its proper divisors (129170979).

206141661 is a wasteful number, since it uses less digits than its factorization.

206141661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67217 (or 67214 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 206141661 is about 14357.6342410580. The cubic root of 206141661 is about 590.7294062173.

The spelling of 206141661 in words is "two hundred six million, one hundred forty-one thousand, six hundred sixty-one".