6621886080 has 576 divisors, whose sum is σ = 25295306400. Its totient is φ = 1652742144.

The previous prime is 6621886069. The next prime is 6621886109. The reversal of 6621886080 is 806881266.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 79781719 + ... + 79781801.

Almost surely, 2^6621886080 is an apocalyptic number.

6621886080 is a gapful number since it is divisible by the number (60) 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 6621886080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12647653200).

6621886080 is an abundant number, since it is smaller than the sum of its proper divisors (18673420320).

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

6621886080 is an frugal number, since it uses more digits than its factorization.

6621886080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 6621886080 is about 81374.9720737279. The cubic root of 6621886080 is about 1877.8485725468.

The spelling of 6621886080 in words is "six billion, six hundred twenty-one million, eight hundred eighty-six thousand, eighty".