206666426 has 16 divisors (see below), whose sum is σ = 317485440. Its totient is φ = 100850400.

The previous prime is 206666413. The next prime is 206666437. The reversal of 206666426 is 624666602.

206666426 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×206666426² = 85422023271226952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206666426.

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, 32726 + ... + 38526.

It is an arithmetic number, because the mean of its divisors is an integer number (19842840).

Almost surely, 2^206666426 is an apocalyptic number.

206666426 is a deficient number, since it is larger than the sum of its proper divisors (110819014).

206666426 is a wasteful number, since it uses less digits than its factorization.

206666426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6229.

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 206666426 is about 14375.8973980757. The cubic root of 206666426 is about 591.2302453668.

The spelling of 206666426 in words is "two hundred six million, six hundred sixty-six thousand, four hundred twenty-six".