206566433431225 has 24 divisors (see below), whose sum is σ = 309953801294208. Its totient is φ = 133313462918400.

The previous prime is 206566433431223. The next prime is 206566433431231. The reversal of 206566433431225 is 522134334665602.

It is a happy number.

It is not a de Polignac number, because 206566433431225 - 2¹ = 206566433431223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206566433431223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34717044661 + ... + 34717050610.

It is an arithmetic number, because the mean of its divisors is an integer number (12914741720592).

Almost surely, 2^{206566433431225} is an apocalyptic number.

206566433431225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206566433431225 is a deficient number, since it is larger than the sum of its proper divisors (103387367862983).

206566433431225 is a wasteful number, since it uses less digits than its factorization.

206566433431225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69434095305 (or 69434095300 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 52.

The spelling of 206566433431225 in words is "two hundred six trillion, five hundred sixty-six billion, four hundred thirty-three million, four hundred thirty-one thousand, two hundred twenty-five".