660652 has 24 divisors (see below), whose sum is σ = 1241856. Its totient is φ = 306768.

The previous prime is 660643. The next prime is 660659. The reversal of 660652 is 256066.

It is a super-2 number, since 2×660652² = 872922130208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660659) by changing a digit.

660652 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 7 ways as a sum of consecutive naturals, for example, 3873 + ... + 4039.

It is an arithmetic number, because the mean of its divisors is an integer number (51744).

2⁶⁶⁰⁶⁵² is an apocalyptic number.

It is an amenable number.

660652 is a deficient number, since it is larger than the sum of its proper divisors (581204).

660652 is a wasteful number, since it uses less digits than its factorization.

660652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 235 counting only the distinct ones).

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

The square root of 660652 is about 812.8050196695. The cubic root of 660652 is about 87.0945376537.

The spelling of 660652 in words is "six hundred sixty thousand, six hundred fifty-two".