6655555544 has 16 divisors (see below), whose sum is σ = 13613636520. Its totient is φ = 3025252480.

The previous prime is 6655555541. The next prime is 6655555561. The reversal of 6655555544 is 4455555566.

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 = 6655555492 and 6655555501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6655555541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37815569 + ... + 37815744.

Almost surely, 2^6655555544 is an apocalyptic number.

It is an amenable number.

6655555544 is an abundant number, since it is smaller than the sum of its proper divisors (6958080976).

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

6655555544 is a wasteful number, since it uses less digits than its factorization.

6655555544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75631330 (or 75631326 counting only the distinct ones).

The product of its digits is 9000000, while the sum is 50.

The square root of 6655555544 is about 81581.5882659807. The cubic root of 6655555544 is about 1881.0258796609.

The spelling of 6655555544 in words is "six billion, six hundred fifty-five million, five hundred fifty-five thousand, five hundred forty-four".