6665017648 has 80 divisors (see below), whose sum is σ = 13841971200. Its totient is φ = 3101978880.

The previous prime is 6665017633. The next prime is 6665017661. The reversal of 6665017648 is 8467105666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2062498 + ... + 2065726.

It is an arithmetic number, because the mean of its divisors is an integer number (173024640).

Almost surely, 2^6665017648 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 6665017648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6920985600).

6665017648 is an abundant number, since it is smaller than the sum of its proper divisors (7176953552).

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

6665017648 is a wasteful number, since it uses less digits than its factorization.

6665017648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410 (or 3404 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 6665017648 is about 81639.5593324707. The cubic root of 6665017648 is about 1881.9168663679.

The spelling of 6665017648 in words is "six billion, six hundred sixty-five million, seventeen thousand, six hundred forty-eight".