665732 has 12 divisors (see below), whose sum is σ = 1173900. Its totient is φ = 330336.

The previous prime is 665723. The next prime is 665747. The reversal of 665732 is 237566.

It can be written as a sum of positive squares in 2 ways, for example, as 51076 + 614656 = 226^2 + 784^2 .

It is a junction number, because it is equal to n+sod(n) for n = 665695 and 665704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38 + ... + 1154.

It is an arithmetic number, because the mean of its divisors is an integer number (97825).

2⁶⁶⁵⁷³² is an apocalyptic number.

It is an amenable number.

665732 is a deficient number, since it is larger than the sum of its proper divisors (508168).

665732 is a wasteful number, since it uses less digits than its factorization.

665732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270 (or 1268 counting only the distinct ones).

The product of its digits is 7560, while the sum is 29.

The square root of 665732 is about 815.9240160701. The cubic root of 665732 is about 87.3172020527.

The spelling of 665732 in words is "six hundred sixty-five thousand, seven hundred thirty-two".