660275712 has 280 divisors, whose sum is σ = 2079738540. Its totient is φ = 209018880.

The previous prime is 660275701. The next prime is 660275713. The reversal of 660275712 is 217572066.

660275712 is a `hidden beast` number, since 6 + 60 + 27 + 571 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 606341376 + 53934336 = 24624^2 + 7344^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (660275713) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 10824162 + ... + 10824222.

Almost surely, 2^660275712 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 660275712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1039869270).

660275712 is an abundant number, since it is smaller than the sum of its proper divisors (1419462828).

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

660275712 is an frugal number, since it uses more digits than its factorization.

660275712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 660275712 is about 25695.8306345602. The cubic root of 660275712 is about 870.7799901535.

The spelling of 660275712 in words is "six hundred sixty million, two hundred seventy-five thousand, seven hundred twelve".