206666473 has 16 divisors (see below), whose sum is σ = 228130560. Its totient is φ = 186028416.

The previous prime is 206666461. The next prime is 206666483. The reversal of 206666473 is 374666602.

It is a cyclic number.

It is not a de Polignac number, because 206666473 - 2⁹ = 206665961 is a prime.

It is a super-2 number, since 2×206666473² = 85422062124519458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206666413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249486 + ... + 250312.

It is an arithmetic number, because the mean of its divisors is an integer number (14258160).

Almost surely, 2^206666473 is an apocalyptic number.

It is an amenable number.

206666473 is a deficient number, since it is larger than the sum of its proper divisors (21464087).

206666473 is a wasteful number, since it uses less digits than its factorization.

206666473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296.

The product of its (nonzero) digits is 217728, while the sum is 40.

The square root of 206666473 is about 14375.8990327562. The cubic root of 206666473 is about 591.2302901859.

The spelling of 206666473 in words is "two hundred six million, six hundred sixty-six thousand, four hundred seventy-three".