2668819 has 4 divisors (see below), whose sum is σ = 2706480. Its totient is φ = 2631160.

The previous prime is 2668793. The next prime is 2668829. The reversal of 2668819 is 9188662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2668819 - 2⁹ = 2668307 is a prime.

It is a super-2 number, since 2×2668819² = 14245189709522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2668829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18724 + ... + 18865.

It is an arithmetic number, because the mean of its divisors is an integer number (676620).

2^2668819 is an apocalyptic number.

2668819 is a deficient number, since it is larger than the sum of its proper divisors (37661).

2668819 is an equidigital number, since it uses as much as digits as its factorization.

2668819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37660.

The product of its digits is 41472, while the sum is 40.

The square root of 2668819 is about 1633.6520437351. The cubic root of 2668819 is about 138.7095534516.

The spelling of 2668819 in words is "two million, six hundred sixty-eight thousand, eight hundred nineteen".