6665506848 has 720 divisors, whose sum is σ = 26863208064. Its totient is φ = 1593768960.

The previous prime is 6665506847. The next prime is 6665506853. The reversal of 6665506848 is 8486055666.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 6665506794 and 6665506803.

It is not an unprimeable number, because it can be changed into a prime (6665506843) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 18161961 + ... + 18162327.

Almost surely, 2^6665506848 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 6665506848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13431604032).

6665506848 is an abundant number, since it is smaller than the sum of its proper divisors (20197701216).

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

6665506848 is a wasteful number, since it uses less digits than its factorization.

6665506848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The square root of 6665506848 is about 81642.5553740205. Note that the first 3 decimals coincide. The cubic root of 6665506848 is about 1881.9629083169.

The spelling of 6665506848 in words is "six billion, six hundred sixty-five million, five hundred six thousand, eight hundred forty-eight".