660720712 has 16 divisors (see below), whose sum is σ = 1239606000. Its totient is φ = 330159120.

The previous prime is 660720703. The next prime is 660720713. The reversal of 660720712 is 217027066.

It is not an unprimeable number, because it can be changed into a prime (660720713) 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 3 ways as a sum of consecutive naturals, for example, 10714 + ... + 37897.

It is an arithmetic number, because the mean of its divisors is an integer number (77475375).

Almost surely, 2^660720712 is an apocalyptic number.

It is an amenable number.

660720712 is a deficient number, since it is larger than the sum of its proper divisors (578885288).

660720712 is a wasteful number, since it uses less digits than its factorization.

660720712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50316 (or 50312 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 660720712 is about 25704.4881684114. The cubic root of 660720712 is about 870.9755701052.

Adding to 660720712 its reverse (217027066), we get a palindrome (877747778).

The spelling of 660720712 in words is "six hundred sixty million, seven hundred twenty thousand, seven hundred twelve".