660297660 has 96 divisors (see below), whose sum is σ = 2021628672. Its totient is φ = 159697920.

The previous prime is 660297653. The next prime is 660297679. The reversal of 660297660 is 66792066.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370692 + ... + 372468.

It is an arithmetic number, because the mean of its divisors is an integer number (21058632).

Almost surely, 2^660297660 is an apocalyptic number.

660297660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660297660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1010814336).

660297660 is an abundant number, since it is smaller than the sum of its proper divisors (1361331012).

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

660297660 is a wasteful number, since it uses less digits than its factorization.

660297660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363 (or 2361 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 660297660 is about 25696.2577041872. The cubic root of 660297660 is about 870.7896384803.

The spelling of 660297660 in words is "six hundred sixty million, two hundred ninety-seven thousand, six hundred sixty".