6665426660 has 24 divisors (see below), whose sum is σ = 14206315200. Its totient is φ = 2626376544.

The previous prime is 6665426633. The next prime is 6665426681. The reversal of 6665426660 is 666245666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2485760 + ... + 2488439.

It is an arithmetic number, because the mean of its divisors is an integer number (591929800).

Almost surely, 2^6665426660 is an apocalyptic number.

It is an amenable number.

6665426660 is an abundant number, since it is smaller than the sum of its proper divisors (7540888540).

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

6665426660 is a wasteful number, since it uses less digits than its factorization.

6665426660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4974275 (or 4974273 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 47.

The square root of 6665426660 is about 81642.0642806146. The cubic root of 6665426660 is about 1881.9553614316.

The spelling of 6665426660 in words is "six billion, six hundred sixty-five million, four hundred twenty-six thousand, six hundred sixty".