660047616 has 180 divisors, whose sum is σ = 1990958200. Its totient is φ = 217479168.

The previous prime is 660047611. The next prime is 660047617. The reversal of 660047616 is 616740066.

660047616 is a `hidden beast` number, since 6 + 600 + 47 + 6 + 1 + 6 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660047611) 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 19 ways as a sum of consecutive naturals, for example, 2882190 + ... + 2882418.

Almost surely, 2^660047616 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 660047616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995479100).

660047616 is an abundant number, since it is smaller than the sum of its proper divisors (1330910584).

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

660047616 is a wasteful number, since it uses less digits than its factorization.

660047616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 660047616 is about 25691.3918657592. The cubic root of 660047616 is about 870.6797066381.

The spelling of 660047616 in words is "six hundred sixty million, forty-seven thousand, six hundred sixteen".