208820606066 has 16 divisors (see below), whose sum is σ = 341086291200. Its totient is φ = 95504160528.

The previous prime is 208820606063. The next prime is 208820606077. The reversal of 208820606066 is 660606028802.

It is a happy number.

208820606066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (208820606063) 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 in 7 ways as a sum of consecutive naturals, for example, 94745090 + ... + 94747293.

It is an arithmetic number, because the mean of its divisors is an integer number (21317893200).

Almost surely, 2^208820606066 is an apocalyptic number.

208820606066 is a deficient number, since it is larger than the sum of its proper divisors (132265685134).

208820606066 is a wasteful number, since it uses less digits than its factorization.

208820606066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189492433.

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 208820606066 in words is "two hundred eight billion, eight hundred twenty million, six hundred six thousand, sixty-six".