206767064321 has 4 divisors (see below), whose sum is σ = 206780422212. Its totient is φ = 206753706432.

The previous prime is 206767064299. The next prime is 206767064341. The reversal of 206767064321 is 123460767602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 125005380721 + 81761683600 = 353561^2 + 285940^2 .

It is a cyclic number.

It is not a de Polignac number, because 206767064321 - 2³⁴ = 189587195137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206767064341) 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 3 ways as a sum of consecutive naturals, for example, 6655700 + ... + 6686693.

It is an arithmetic number, because the mean of its divisors is an integer number (51695105553).

Almost surely, 2^206767064321 is an apocalyptic number.

It is an amenable number.

206767064321 is a deficient number, since it is larger than the sum of its proper divisors (13357891).

206767064321 is a wasteful number, since it uses less digits than its factorization.

206767064321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13357890.

The product of its (nonzero) digits is 508032, while the sum is 44.

The spelling of 206767064321 in words is "two hundred six billion, seven hundred sixty-seven million, sixty-four thousand, three hundred twenty-one".