206566665010 has 8 divisors (see below), whose sum is σ = 371819997036. Its totient is φ = 82626666000.

The previous prime is 206566665007. The next prime is 206566665029. The reversal of 206566665010 is 10566665602.

It can be written as a sum of positive squares in 2 ways, for example, as 206409388329 + 157276681 = 454323^2 + 12541^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10328333241 + ... + 10328333260.

Almost surely, 2^206566665010 is an apocalyptic number.

206566665010 is a deficient number, since it is larger than the sum of its proper divisors (165253332026).

206566665010 is a wasteful number, since it uses less digits than its factorization.

206566665010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20656666508.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 206566665010 in words is "two hundred six billion, five hundred sixty-six million, six hundred sixty-five thousand, ten".