6646331016 has 512 divisors, whose sum is σ = 22338892800. Its totient is φ = 1811496960.

The previous prime is 6646330997. The next prime is 6646331023. The reversal of 6646331016 is 6101336466.

6646331016 is a `hidden beast` number, since 6 + 6 + 4 + 633 + 1 + 0 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 93610261 + ... + 93610331.

It is an arithmetic number, because the mean of its divisors is an integer number (43630650).

Almost surely, 2^6646331016 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 6646331016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11169446400).

6646331016 is an abundant number, since it is smaller than the sum of its proper divisors (15692561784).

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

6646331016 is a wasteful number, since it uses less digits than its factorization.

6646331016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 6646331016 is about 81525.0330634708. The cubic root of 6646331016 is about 1880.1564506891.

It can be divided in two parts, 66463 and 31016, that added together give a palindrome (97479).

The spelling of 6646331016 in words is "six billion, six hundred forty-six million, three hundred thirty-one thousand, sixteen".