6665218488 has 80 divisors (see below), whose sum is σ = 19271060160. Its totient is φ = 2150064000.

The previous prime is 6665218481. The next prime is 6665218529. The reversal of 6665218488 is 8848125666.

It is a super-2 number, since 2×6665218488² = 88850274985554012288, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665218481) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 145813 + ... + 185988.

It is an arithmetic number, because the mean of its divisors is an integer number (240888252).

Almost surely, 2^6665218488 is an apocalyptic number.

It is an amenable number.

6665218488 is an abundant number, since it is smaller than the sum of its proper divisors (12605841672).

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

6665218488 is a wasteful number, since it uses less digits than its factorization.

6665218488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331850 (or 331837 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 54.

The square root of 6665218488 is about 81640.7893641408. The cubic root of 6665218488 is about 1881.9357690629.

The spelling of 6665218488 in words is "six billion, six hundred sixty-five million, two hundred eighteen thousand, four hundred eighty-eight".