803665 has 8 divisors (see below), whose sum is σ = 979200. Its totient is φ = 633072.

The previous prime is 803659. The next prime is 803669. The reversal of 803665 is 566308.

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

It is a cyclic number.

It is not a de Polignac number, because 803665 - 2¹¹ = 801617 is a prime.

803665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (803669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865 + ... + 1534.

It is an arithmetic number, because the mean of its divisors is an integer number (122400).

2⁸⁰³⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

803665 is a deficient number, since it is larger than the sum of its proper divisors (175535).

803665 is a wasteful number, since it uses less digits than its factorization.

803665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 803665 is about 896.4736471308. The cubic root of 803665 is about 92.9733225983.

The spelling of 803665 in words is "eight hundred three thousand, six hundred sixty-five".