660298128 has 120 divisors (see below), whose sum is σ = 1992158208. Its totient is φ = 187907328.

The previous prime is 660298123. The next prime is 660298141. The reversal of 660298128 is 821892066.

660298128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 660298128.

It is not an unprimeable number, because it can be changed into a prime (660298123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 900450 + ... + 901182.

Almost surely, 2^660298128 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 660298128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (996079104).

660298128 is an abundant number, since it is smaller than the sum of its proper divisors (1331860080).

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

660298128 is a wasteful number, since it uses less digits than its factorization.

660298128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 660298128 is about 25696.2668105700. The cubic root of 660298128 is about 870.7898442104.

The spelling of 660298128 in words is "six hundred sixty million, two hundred ninety-eight thousand, one hundred twenty-eight".