2666838 has 8 divisors (see below), whose sum is σ = 5333688. Its totient is φ = 888944.

The previous prime is 2666819. The next prime is 2666861. The reversal of 2666838 is 8386662.

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

2666838 is an admirable number.

It is a super-2 number, since 2×2666838² = 14224049836488, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2666796 and 2666805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222231 + ... + 222242.

It is an arithmetic number, because the mean of its divisors is an integer number (666711).

2^2666838 is an apocalyptic number.

2666838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2666838 is a wasteful number, since it uses less digits than its factorization.

2666838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444478.

The product of its digits is 82944, while the sum is 39.

The square root of 2666838 is about 1633.0456209182. The cubic root of 2666838 is about 138.6752247040.

The spelling of 2666838 in words is "two million, six hundred sixty-six thousand, eight hundred thirty-eight".