206320066 has 16 divisors (see below), whose sum is σ = 328101120. Its totient is φ = 97133040.

The previous prime is 206320061. The next prime is 206320099. The reversal of 206320066 is 660023602.

206320066 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 206320066.

It is not an unprimeable number, because it can be changed into a prime (206320061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42676 + ... + 47263.

It is an arithmetic number, because the mean of its divisors is an integer number (20506320).

Almost surely, 2^206320066 is an apocalyptic number.

206320066 is a deficient number, since it is larger than the sum of its proper divisors (121781054).

206320066 is a wasteful number, since it uses less digits than its factorization.

206320066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90009.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 206320066 is about 14363.8457942154. The cubic root of 206320066 is about 590.8997723802.

Adding to 206320066 its reverse (660023602), we get a palindrome (866343668).

The spelling of 206320066 in words is "two hundred six million, three hundred twenty thousand, sixty-six".