206666444 has 12 divisors (see below), whose sum is σ = 361767000. Its totient is φ = 103304448.

The previous prime is 206666437. The next prime is 206666459. The reversal of 206666444 is 444666602.

206666444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×206666444² = 85422038151210272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206666398 and 206666407.

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, 23852 + ... + 31340.

It is an arithmetic number, because the mean of its divisors is an integer number (30147250).

Almost surely, 2^206666444 is an apocalyptic number.

It is an amenable number.

206666444 is a deficient number, since it is larger than the sum of its proper divisors (155100556).

206666444 is a wasteful number, since it uses less digits than its factorization.

206666444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14392 (or 14390 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The square root of 206666444 is about 14375.8980241236. The cubic root of 206666444 is about 591.2302625316.

The spelling of 206666444 in words is "two hundred six million, six hundred sixty-six thousand, four hundred forty-four".