2806666 has 8 divisors (see below), whose sum is σ = 4457700. Its totient is φ = 1320768.

The previous prime is 2806663. The next prime is 2806673. The reversal of 2806666 is 6666082.

2806666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2480625 + 326041 = 1575^2 + 571^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 82549 = 2806666 / (2 + 8 + 0 + 6 + 6 + 6 + 6).

2806666 is a modest number, since divided by 6666 gives 280 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2806663) 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, 41241 + ... + 41308.

2^2806666 is an apocalyptic number.

2806666 is a deficient number, since it is larger than the sum of its proper divisors (1651034).

2806666 is a wasteful number, since it uses less digits than its factorization.

2806666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82568.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 2806666 is about 1675.3107174492. The cubic root of 2806666 is about 141.0577366954.

The spelling of 2806666 in words is "two million, eight hundred six thousand, six hundred sixty-six".