206866051 has 8 divisors (see below), whose sum is σ = 239947520. Its totient is φ = 174666888.

The previous prime is 206866043. The next prime is 206866061. The reversal of 206866051 is 150668602.

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

It is a cyclic number.

It is not a de Polignac number, because 206866051 - 2³ = 206866043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206865998 and 206866016.

It is not an unprimeable number, because it can be changed into a prime (206866061) 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 7 ways as a sum of consecutive naturals, for example, 220071 + ... + 221008.

It is an arithmetic number, because the mean of its divisors is an integer number (29993440).

Almost surely, 2^206866051 is an apocalyptic number.

206866051 is a deficient number, since it is larger than the sum of its proper divisors (33081469).

206866051 is an equidigital number, since it uses as much as digits as its factorization.

206866051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441153.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 206866051 is about 14382.8387670863. The cubic root of 206866051 is about 591.4205461643.

The spelling of 206866051 in words is "two hundred six million, eight hundred sixty-six thousand, fifty-one".