6661726848 has 256 divisors, whose sum is σ = 22555872000. Its totient is φ = 1896099840.

The previous prime is 6661726847. The next prime is 6661726867. The reversal of 6661726848 is 8486271666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 6661726794 and 6661726803.

It is not an unprimeable number, because it can be changed into a prime (6661726847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12313458 + ... + 12313998.

It is an arithmetic number, because the mean of its divisors is an integer number (88108875).

Almost surely, 2^6661726848 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 6661726848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11277936000).

6661726848 is an abundant number, since it is smaller than the sum of its proper divisors (15894145152).

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

6661726848 is a wasteful number, since it uses less digits than its factorization.

6661726848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080 (or 1062 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 6661726848 is about 81619.4023991845. The cubic root of 6661726848 is about 1881.6070881657.

The spelling of 6661726848 in words is "six billion, six hundred sixty-one million, seven hundred twenty-six thousand, eight hundred forty-eight".