6646055680 has 288 divisors, whose sum is σ = 18098131968. Its totient is φ = 2336829440.

The previous prime is 6646055659. The next prime is 6646055743. The reversal of 6646055680 is 865506466.

It is a super-2 number, since 2×6646055680² = 88340112203320524800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6646055680.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80072919 + ... + 80073001.

It is an arithmetic number, because the mean of its divisors is an integer number (62840736).

Almost surely, 2^6646055680 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 6646055680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9049065984).

6646055680 is an abundant number, since it is smaller than the sum of its proper divisors (11452076288).

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

6646055680 is an equidigital number, since it uses as much as digits as its factorization.

6646055680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The square root of 6646055680 is about 81523.3443867461. The cubic root of 6646055680 is about 1880.1304873968.

The spelling of 6646055680 in words is "six billion, six hundred forty-six million, fifty-five thousand, six hundred eighty".