206766061 has 2 divisors, whose sum is σ = 206766062. Its totient is φ = 206766060.

The previous prime is 206766047. The next prime is 206766163. The reversal of 206766061 is 160667602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141253225 + 65512836 = 11885^2 + 8094^2 .

It is a cyclic number.

It is not a de Polignac number, because 206766061 - 2⁵ = 206766029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206766041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103383030 + 103383031.

It is an arithmetic number, because the mean of its divisors is an integer number (103383031).

Almost surely, 2^206766061 is an apocalyptic number.

It is an amenable number.

206766061 is a deficient number, since it is larger than the sum of its proper divisors (1).

206766061 is an equidigital number, since it uses as much as digits as its factorization.

206766061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 206766061 is about 14379.3623293942. The cubic root of 206766061 is about 591.3252418670.

The spelling of 206766061 in words is "two hundred six million, seven hundred sixty-six thousand, sixty-one".