1006666666 has 8 divisors (see below), whose sum is σ = 1523853540. Its totient is φ = 498715488.

The previous prime is 1006666649. The next prime is 1006666667. The reversal of 1006666666 is 6666666001.

It can be written as a sum of positive squares in 2 ways, for example, as 848032641 + 158634025 = 29121^2 + 12595^2 .

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

1006666666 is a modest number, since divided by 66666 gives 10066 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1006666667) by changing a digit.

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, 2308651 + ... + 2309086.

Almost surely, 2^1006666666 is an apocalyptic number.

1006666666 is a deficient number, since it is larger than the sum of its proper divisors (517186874).

1006666666 is a wasteful number, since it uses less digits than its factorization.

1006666666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4617848.

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 1006666666 is about 31728.0107476028. The cubic root of 1006666666 is about 1002.2173019384.

The spelling of 1006666666 in words is "one billion, six million, six hundred sixty-six thousand, six hundred sixty-six".