206168666 has 8 divisors (see below), whose sum is σ = 337366944. Its totient is φ = 93713020.

The previous prime is 206168659. The next prime is 206168671. The reversal of 206168666 is 666861602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4685630 + ... + 4685673.

It is an arithmetic number, because the mean of its divisors is an integer number (42170868).

Almost surely, 2^206168666 is an apocalyptic number.

206168666 is a deficient number, since it is larger than the sum of its proper divisors (131198278).

206168666 is a wasteful number, since it uses less digits than its factorization.

206168666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9371316.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 206168666 is about 14358.5746507096. The cubic root of 206168666 is about 590.7552006977.

The spelling of 206168666 in words is "two hundred six million, one hundred sixty-eight thousand, six hundred sixty-six".