2666813 has 4 divisors (see below), whose sum is σ = 2670108. Its totient is φ = 2663520.

The previous prime is 2666809. The next prime is 2666819. The reversal of 2666813 is 3186662.

2666813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 822649 + 1844164 = 907^2 + 1358^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666813 - 2² = 2666809 is a prime.

It is a super-2 number, since 2×2666813² = 14223783153938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2666813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666819) 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, 503 + ... + 2363.

It is an arithmetic number, because the mean of its divisors is an integer number (667527).

2^2666813 is an apocalyptic number.

It is an amenable number.

2666813 is a deficient number, since it is larger than the sum of its proper divisors (3295).

2666813 is a wasteful number, since it uses less digits than its factorization.

2666813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294.

The product of its digits is 10368, while the sum is 32.

The square root of 2666813 is about 1633.0379664907. The cubic root of 2666813 is about 138.6747913704.

The spelling of 2666813 in words is "two million, six hundred sixty-six thousand, eight hundred thirteen".