6646283280 has 1080 divisors, whose sum is σ = 30429427392. Its totient is φ = 1319804928.

The previous prime is 6646283269. The next prime is 6646283327. The reversal of 6646283280 is 823826466.

It is a tau number, because it is divible by the number of its divisors (1080).

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

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 390957832 + ... + 390957848.

Almost surely, 2^6646283280 is an apocalyptic number.

6646283280 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 6646283280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15214713696).

6646283280 is an abundant number, since it is smaller than the sum of its proper divisors (23783144112).

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

6646283280 is a wasteful number, since it uses less digits than its factorization.

6646283280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 6646283280 is about 81524.7402939746. The cubic root of 6646283280 is about 1880.1519493904.

The spelling of 6646283280 in words is "six billion, six hundred forty-six million, two hundred eighty-three thousand, two hundred eighty".