6646026240 has 832 divisors, whose sum is σ = 28874257920. Its totient is φ = 1415577600.

The previous prime is 6646026229. The next prime is 6646026263. The reversal of 6646026240 is 426206466.

6646026240 is a `hidden beast` number, since 6 + 6 + 4 + 602 + 6 + 2 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 6646026195 and 6646026204.

It is a congruent number.

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, 65802190 + ... + 65802290.

Almost surely, 2^6646026240 is an apocalyptic number.

6646026240 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 6646026240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14437128960).

6646026240 is an abundant number, since it is smaller than the sum of its proper divisors (22228231680).

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

6646026240 is a wasteful number, since it uses less digits than its factorization.

6646026240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 6646026240 is about 81523.1638247682. The cubic root of 6646026240 is about 1880.1277112578.

The spelling of 6646026240 in words is "six billion, six hundred forty-six million, twenty-six thousand, two hundred forty".