6660601056 has 96 divisors (see below), whose sum is σ = 19608583680. Its totient is φ = 2199420288.

The previous prime is 6660601049. The next prime is 6660601067. The reversal of 6660601056 is 6501060666.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a self number, because there is not a number n which added to its sum of digits gives 6660601056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56425 + ... + 128471.

It is an arithmetic number, because the mean of its divisors is an integer number (204256080).

Almost surely, 2^6660601056 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 6660601056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9804291840).

6660601056 is an abundant number, since it is smaller than the sum of its proper divisors (12947982624).

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

6660601056 is a wasteful number, since it uses less digits than its factorization.

6660601056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72173 (or 72159 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 6660601056 is about 81612.5055123294. The cubic root of 6660601056 is about 1881.5010887458.

The spelling of 6660601056 in words is "six billion, six hundred sixty million, six hundred one thousand, fifty-six".