2666439 has 12 divisors (see below), whose sum is σ = 3994536. Its totient is φ = 1777464.

The previous prime is 2666429. The next prime is 2666453. The reversal of 2666439 is 9346662.

It is not a de Polignac number, because 2666439 - 2⁴ = 2666423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666429) 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 11 ways as a sum of consecutive naturals, for example, 5244 + ... + 5729.

It is an arithmetic number, because the mean of its divisors is an integer number (332878).

2^2666439 is an apocalyptic number.

2666439 is a deficient number, since it is larger than the sum of its proper divisors (1328097).

2666439 is an equidigital number, since it uses as much as digits as its factorization.

2666439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10988 (or 10976 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 2666439 is about 1632.9234519720. The cubic root of 2666439 is about 138.6683083766.

The spelling of 2666439 in words is "two million, six hundred sixty-six thousand, four hundred thirty-nine".