660750 has 32 divisors (see below), whose sum is σ = 1651104. Its totient is φ = 176000.

The previous prime is 660733. The next prime is 660757. The reversal of 660750 is 57066.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 660750.

It is a congruent number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310 + ... + 1190.

It is an arithmetic number, because the mean of its divisors is an integer number (51597).

2⁶⁶⁰⁷⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (825552).

660750 is an abundant number, since it is smaller than the sum of its proper divisors (990354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660750 is a wasteful number, since it uses less digits than its factorization.

660750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 660750 is about 812.8653024948. The cubic root of 660750 is about 87.0988439262.

The spelling of 660750 in words is "six hundred sixty thousand, seven hundred fifty".