660112128 has 108 divisors (see below), whose sum is σ = 2049764080. Its totient is φ = 203102208.

The previous prime is 660112127. The next prime is 660112157. The reversal of 660112128 is 821211066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660112127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18933 + ... + 40971.

Almost surely, 2^660112128 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 660112128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1024882040).

660112128 is an abundant number, since it is smaller than the sum of its proper divisors (1389651952).

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

660112128 is a wasteful number, since it uses less digits than its factorization.

660112128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22074 (or 22057 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 660112128 is about 25692.6473528907. The cubic root of 660112128 is about 870.7080719954.

The spelling of 660112128 in words is "six hundred sixty million, one hundred twelve thousand, one hundred twenty-eight".