6660855672 has 64 divisors (see below), whose sum is σ = 17207132160. Its totient is φ = 2146435200.

The previous prime is 6660855623. The next prime is 6660855709. The reversal of 6660855672 is 2765580666.

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, 809097 + ... + 817287.

It is an arithmetic number, because the mean of its divisors is an integer number (268861440).

Almost surely, 2^6660855672 is an apocalyptic number.

6660855672 is a gapful number since it is divisible by the number (62) 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 6660855672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8603566080).

6660855672 is an abundant number, since it is smaller than the sum of its proper divisors (10546276488).

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

6660855672 is a wasteful number, since it uses less digits than its factorization.

6660855672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9324 (or 9320 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 51.

The square root of 6660855672 is about 81614.0654054189. The cubic root of 6660855672 is about 1881.5250632677.

The spelling of 6660855672 in words is "six billion, six hundred sixty million, eight hundred fifty-five thousand, six hundred seventy-two".