2813666 has 8 divisors (see below), whose sum is σ = 4323564. Its totient is φ = 1372480.

The previous prime is 2813663. The next prime is 2813669. The reversal of 2813666 is 6663182.

It is an interprime number because it is at equal distance from previous prime (2813663) and next prime (2813669).

It can be written as a sum of positive squares in 2 ways, for example, as 2418025 + 395641 = 1555^2 + 629^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2813663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17075 + ... + 17238.

2^2813666 is an apocalyptic number.

2813666 is a deficient number, since it is larger than the sum of its proper divisors (1509898).

2813666 is a wasteful number, since it uses less digits than its factorization.

2813666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34356.

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

The square root of 2813666 is about 1677.3985811369. The cubic root of 2813666 is about 141.1749082684.

The spelling of 2813666 in words is "two million, eight hundred thirteen thousand, six hundred sixty-six".