2661804 has 18 divisors (see below), whose sum is σ = 6728540. Its totient is φ = 887256.

The previous prime is 2661797. The next prime is 2661821. The reversal of 2661804 is 4081662.

2661804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 36934 + ... + 37005.

2^2661804 is an apocalyptic number.

It is an amenable number.

2661804 is an abundant number, since it is smaller than the sum of its proper divisors (4066736).

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

2661804 is a wasteful number, since it uses less digits than its factorization.

2661804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73949 (or 73944 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2661804 is about 1631.5036009767. The cubic root of 2661804 is about 138.5879139652.

The spelling of 2661804 in words is "two million, six hundred sixty-one thousand, eight hundred four".