6648726240 has 960 divisors, whose sum is σ = 27867248640. Its totient is φ = 1478062080.

The previous prime is 6648726233. The next prime is 6648726241. The reversal of 6648726240 is 426278466.

It is a super-2 number, since 2×6648726240² = 88411121228929075200, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6648726241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 99234687 + ... + 99234753.

It is an arithmetic number, because the mean of its divisors is an integer number (29028384).

Almost surely, 2^6648726240 is an apocalyptic number.

6648726240 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 6648726240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13933624320).

6648726240 is an abundant number, since it is smaller than the sum of its proper divisors (21218522400).

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

6648726240 is a wasteful number, since it uses less digits than its factorization.

6648726240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The square root of 6648726240 is about 81539.7218538302. The cubic root of 6648726240 is about 1880.3822823031.

The spelling of 6648726240 in words is "six billion, six hundred forty-eight million, seven hundred twenty-six thousand, two hundred forty".