665752 has 8 divisors (see below), whose sum is σ = 1248300. Its totient is φ = 332872.

The previous prime is 665747. The next prime is 665761. The reversal of 665752 is 257566.

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

665752 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 (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41602 + ... + 41617.

2⁶⁶⁵⁷⁵² is an apocalyptic number.

It is an amenable number.

665752 is a deficient number, since it is larger than the sum of its proper divisors (582548).

665752 is a wasteful number, since it uses less digits than its factorization.

665752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83225 (or 83221 counting only the distinct ones).

The product of its digits is 12600, while the sum is 31.

The square root of 665752 is about 815.9362720213. The cubic root of 665752 is about 87.3180764418.

The spelling of 665752 in words is "six hundred sixty-five thousand, seven hundred fifty-two".