665466 has 16 divisors (see below), whose sum is σ = 1340064. Its totient is φ = 220304.

The previous prime is 665447. The next prime is 665479. The reversal of 665466 is 664566.

It is a Curzon number.

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, 901 + ... + 1463.

It is an arithmetic number, because the mean of its divisors is an integer number (83754).

2⁶⁶⁵⁴⁶⁶ is an apocalyptic number.

665466 is an abundant number, since it is smaller than the sum of its proper divisors (674598).

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

665466 is a wasteful number, since it uses less digits than its factorization.

665466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765.

The product of its digits is 25920, while the sum is 33.

The square root of 665466 is about 815.7609944095. The cubic root of 665466 is about 87.3055710110.

Subtracting from 665466 its reverse (664566), we obtain a square (900 = 30²).

The spelling of 665466 in words is "six hundred sixty-five thousand, four hundred sixty-six".