804661 has 16 divisors (see below), whose sum is σ = 1003968. Its totient is φ = 633600.

The previous prime is 804653. The next prime is 804689. The reversal of 804661 is 166408.

804661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 804661 - 2³ = 804653 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2266 + ... + 2596.

It is an arithmetic number, because the mean of its divisors is an integer number (62748).

2⁸⁰⁴⁶⁶¹ is an apocalyptic number.

It is an amenable number.

804661 is a deficient number, since it is larger than the sum of its proper divisors (199307).

804661 is a wasteful number, since it uses less digits than its factorization.

804661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 804661 is about 897.0289850389. The cubic root of 804661 is about 93.0117147150.

The spelling of 804661 in words is "eight hundred four thousand, six hundred sixty-one".