8444666880 has 704 divisors, whose sum is σ = 33454202880. Its totient is φ = 2006581248.

The previous prime is 8444666807. The next prime is 8444666903. The reversal of 8444666880 is 886664448.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66493377 + ... + 66493503.

Almost surely, 2^8444666880 is an apocalyptic number.

8444666880 is a gapful number since it is divisible by the number (80) 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 8444666880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16727101440).

8444666880 is an abundant number, since it is smaller than the sum of its proper divisors (25009536000).

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

8444666880 is a wasteful number, since it uses less digits than its factorization.

8444666880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 54.

The square root of 8444666880 is about 91894.8686271437. The cubic root of 8444666880 is about 2036.3894613299.

The spelling of 8444666880 in words is "eight billion, four hundred forty-four million, six hundred sixty-six thousand, eight hundred eighty".