6646081104 has 240 divisors, whose sum is σ = 21679362432. Its totient is φ = 1955695104.

The previous prime is 6646081097. The next prime is 6646081157. The reversal of 6646081104 is 4011806466.

6646081104 is a `hidden beast` number, since 6 + 646 + 0 + 8 + 1 + 1 + 0 + 4 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1159654 + ... + 1165370.

Almost surely, 2^6646081104 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 6646081104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10839681216).

6646081104 is an abundant number, since it is smaller than the sum of its proper divisors (15033281328).

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

6646081104 is a wasteful number, since it uses less digits than its factorization.

6646081104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5776 (or 5758 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 6646081104 is about 81523.5003173931. The cubic root of 6646081104 is about 1880.1328848276.

The spelling of 6646081104 in words is "six billion, six hundred forty-six million, eighty-one thousand, one hundred four".