6646279880430 has 192 divisors, whose sum is σ = 18296808042240. Its totient is φ = 1735486373376.

The previous prime is 6646279880377. The next prime is 6646279880431. The reversal of 6646279880430 is 340889726466.

6646279880430 is a `hidden beast` number, since 6 + 6 + 462 + 7 + 98 + 80 + 4 + 3 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646279880431) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22645161 + ... + 22936779.

It is an arithmetic number, because the mean of its divisors is an integer number (95295875220).

Almost surely, 2^{6646279880430} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6646279880430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9148404021120).

6646279880430 is an abundant number, since it is smaller than the sum of its proper divisors (11650528161810).

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

6646279880430 is a wasteful number, since it uses less digits than its factorization.

6646279880430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291837 (or 291825 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 63.

The spelling of 6646279880430 in words is "six trillion, six hundred forty-six billion, two hundred seventy-nine million, eight hundred eighty thousand, four hundred thirty".