206666446 has 16 divisors (see below), whose sum is σ = 354946176. Its totient is φ = 88406136.

The previous prime is 206666437. The next prime is 206666459. The reversal of 206666446 is 644666602.

It is a super-2 number, since 2×206666446² = 85422039804541832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206666399 and 206666408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5836 + ... + 21151.

It is an arithmetic number, because the mean of its divisors is an integer number (22184136).

Almost surely, 2^206666446 is an apocalyptic number.

206666446 is a deficient number, since it is larger than the sum of its proper divisors (148279730).

206666446 is a wasteful number, since it uses less digits than its factorization.

206666446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27543.

The product of its (nonzero) digits is 248832, while the sum is 40.

The square root of 206666446 is about 14375.8980936844. The cubic root of 206666446 is about 591.2302644388.

The spelling of 206666446 in words is "two hundred six million, six hundred sixty-six thousand, four hundred forty-six".