2666404 has 24 divisors (see below), whose sum is σ = 5136768. Its totient is φ = 1203360.

The previous prime is 2666393. The next prime is 2666423. The reversal of 2666404 is 4046662.

2666404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1899 + ... + 2989.

It is an arithmetic number, because the mean of its divisors is an integer number (214032).

2^2666404 is an apocalyptic number.

It is an amenable number.

2666404 is a deficient number, since it is larger than the sum of its proper divisors (2470364).

2666404 is a wasteful number, since it uses less digits than its factorization.

2666404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155 (or 1153 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 2666404 is about 1632.9127349617. The cubic root of 2666404 is about 138.6677016483.

It can be divided in two parts, 266 and 6404, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 2666404 in words is "two million, six hundred sixty-six thousand, four hundred four".