660525072 has 80 divisors (see below), whose sum is σ = 1817562240. Its totient is φ = 205981696.

The previous prime is 660525053. The next prime is 660525079. The reversal of 660525072 is 270525066.

It is not an unprimeable number, because it can be changed into a prime (660525079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138829 + ... + 143507.

It is an arithmetic number, because the mean of its divisors is an integer number (22719528).

Almost surely, 2^660525072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660525072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (908781120).

660525072 is an abundant number, since it is smaller than the sum of its proper divisors (1157037168).

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

660525072 is a wasteful number, since it uses less digits than its factorization.

660525072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4880 (or 4874 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 660525072 is about 25700.6823255726. The cubic root of 660525072 is about 870.8895960678.

The spelling of 660525072 in words is "six hundred sixty million, five hundred twenty-five thousand, seventy-two".