660752 has 20 divisors (see below), whose sum is σ = 1303116. Its totient is φ = 324480.

The previous prime is 660733. The next prime is 660757. The reversal of 660752 is 257066.

It can be written as a sum of positive squares in 2 ways, for example, as 364816 + 295936 = 604^2 + 544^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (660757) by changing a digit.

660752 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638 + ... + 1314.

2⁶⁶⁰⁷⁵² is an apocalyptic number.

It is an amenable number.

660752 is a deficient number, since it is larger than the sum of its proper divisors (642364).

660752 is a wasteful number, since it uses less digits than its factorization.

660752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 740 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 660752 is about 812.8665327100. The cubic root of 660752 is about 87.0989318049.

The spelling of 660752 in words is "six hundred sixty thousand, seven hundred fifty-two".