206266566121 has 64 divisors (see below), whose sum is σ = 276784128000. Its totient is φ = 148852408320.

The previous prime is 206266566097. The next prime is 206266566131. The reversal of 206266566121 is 121665662602.

It is a happy number.

It is not a de Polignac number, because 206266566121 - 2²⁵ = 206233011689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206266566131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 96883185 + ... + 96885313.

It is an arithmetic number, because the mean of its divisors is an integer number (4324752000).

Almost surely, 2^206266566121 is an apocalyptic number.

It is an amenable number.

206266566121 is a deficient number, since it is larger than the sum of its proper divisors (70517561879).

206266566121 is a wasteful number, since it uses less digits than its factorization.

206266566121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3622.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 206266566121 in words is "two hundred six billion, two hundred sixty-six million, five hundred sixty-six thousand, one hundred twenty-one".