206668667 has 2 divisors, whose sum is σ = 206668668. Its totient is φ = 206668666.

The previous prime is 206668663. The next prime is 206668699. The reversal of 206668667 is 766866602.

206668667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206668667 - 2² = 206668663 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206668663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103334333 + 103334334.

It is an arithmetic number, because the mean of its divisors is an integer number (103334334).

Almost surely, 2^206668667 is an apocalyptic number.

206668667 is a deficient number, since it is larger than the sum of its proper divisors (1).

206668667 is an equidigital number, since it uses as much as digits as its factorization.

206668667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 206668667 is about 14375.9753408247. The cubic root of 206668667 is about 591.2323823728.

The spelling of 206668667 in words is "two hundred six million, six hundred sixty-eight thousand, six hundred sixty-seven".