1006666 has 8 divisors (see below), whose sum is σ = 1525860. Its totient is φ = 498048.

The previous prime is 1006651. The next prime is 1006711. The reversal of 1006666 is 6666001.

It can be written as a sum of positive squares in 2 ways, for example, as 990025 + 16641 = 995^2 + 129^2 .

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

1006666 is a modest number, since divided by 6666 gives 100 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1006666.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2401 + ... + 2788.

2^1006666 is an apocalyptic number.

1006666 is a deficient number, since it is larger than the sum of its proper divisors (519194).

1006666 is an equidigital number, since it uses as much as digits as its factorization.

1006666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5288.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1006666 is about 1003.3274639917. The cubic root of 1006666 is about 100.2217080920.

The spelling of 1006666 in words is "one million, six thousand, six hundred sixty-six".