665794 has 8 divisors (see below), whose sum is σ = 1002240. Its totient is φ = 331716.

The previous prime is 665789. The next prime is 665801. The reversal of 665794 is 497566.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567 + ... + 1285.

It is an arithmetic number, because the mean of its divisors is an integer number (125280).

2⁶⁶⁵⁷⁹⁴ is an apocalyptic number.

665794 is a deficient number, since it is larger than the sum of its proper divisors (336446).

665794 is a wasteful number, since it uses less digits than its factorization.

665794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184.

The product of its digits is 45360, while the sum is 37.

The square root of 665794 is about 815.9620089195. The cubic root of 665794 is about 87.3199126021.

The spelling of 665794 in words is "six hundred sixty-five thousand, seven hundred ninety-four".