206660141 has 2 divisors, whose sum is σ = 206660142. Its totient is φ = 206660140.

The previous prime is 206660137. The next prime is 206660147. The reversal of 206660141 is 141066602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206353225 + 306916 = 14365^2 + 554^2 .

It is a cyclic number.

It is not a de Polignac number, because 206660141 - 2² = 206660137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 206660141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206660147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103330070 + 103330071.

It is an arithmetic number, because the mean of its divisors is an integer number (103330071).

Almost surely, 2^206660141 is an apocalyptic number.

It is an amenable number.

206660141 is a deficient number, since it is larger than the sum of its proper divisors (1).

206660141 is an equidigital number, since it uses as much as digits as its factorization.

206660141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 206660141 is about 14375.6788013645. The cubic root of 206660141 is about 591.2242519408.

The spelling of 206660141 in words is "two hundred six million, six hundred sixty thousand, one hundred forty-one".