665602 has 8 divisors (see below), whose sum is σ = 1141056. Its totient is φ = 285252.

The previous prime is 665591. The next prime is 665603. The reversal of 665602 is 206566.

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

It is not an unprimeable number, because it can be changed into a prime (665603) by changing a digit.

665602 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23758 + ... + 23785.

It is an arithmetic number, because the mean of its divisors is an integer number (142632).

2⁶⁶⁵⁶⁰² is an apocalyptic number.

665602 is a deficient number, since it is larger than the sum of its proper divisors (475454).

665602 is a wasteful number, since it uses less digits than its factorization.

665602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47552.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 665602 is about 815.8443478998. The cubic root of 665602 is about 87.3115180962.

The spelling of 665602 in words is "six hundred sixty-five thousand, six hundred two".