2666823 has 8 divisors (see below), whose sum is σ = 3577728. Its totient is φ = 1766904.

The previous prime is 2666819. The next prime is 2666861. The reversal of 2666823 is 3286662.

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

It is not a de Polignac number, because 2666823 - 2² = 2666819 is a prime.

It is a super-2 number, since 2×2666823² = 14223889826658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2161 + ... + 3162.

It is an arithmetic number, because the mean of its divisors is an integer number (447216).

2^2666823 is an apocalyptic number.

2666823 is a deficient number, since it is larger than the sum of its proper divisors (910905).

2666823 is a wasteful number, since it uses less digits than its factorization.

2666823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5493.

The product of its digits is 20736, while the sum is 33.

The square root of 2666823 is about 1633.0410282660. The cubic root of 2666823 is about 138.6749647042.

The spelling of 2666823 in words is "two million, six hundred sixty-six thousand, eight hundred twenty-three".