6666555544 has 32 divisors (see below), whose sum is σ = 13645538640. Its totient is φ = 3028163200.

The previous prime is 6666555473. The next prime is 6666555563. The reversal of 6666555544 is 4455556666.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6666555491 and 6666555500.

It is a congruent number.

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, 106014 + ... + 156754.

Almost surely, 2^6666555544 is an apocalyptic number.

It is an amenable number.

6666555544 is an abundant number, since it is smaller than the sum of its proper divisors (6978983096).

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

6666555544 is a wasteful number, since it uses less digits than its factorization.

6666555544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52251 (or 52247 counting only the distinct ones).

The product of its digits is 12960000, while the sum is 52.

The square root of 6666555544 is about 81648.9776053565. The cubic root of 6666555544 is about 1882.0616006607.

The spelling of 6666555544 in words is "six billion, six hundred sixty-six million, five hundred fifty-five thousand, five hundred forty-four".