6655999999 has 8 divisors (see below), whose sum is σ = 7261793280. Its totient is φ = 6050323800.

The previous prime is 6655999997. The next prime is 6656000017. The reversal of 6655999999 is 9999995566.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6655999999 - 2¹ = 6655999997 is a prime.

It is a Duffinian number.

6655999999 is a modest number, since divided by 99999 gives 66559 as remainder.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6655999997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124962 + ... + 170080.

It is an arithmetic number, because the mean of its divisors is an integer number (907724160).

Almost surely, 2^6655999999 is an apocalyptic number.

6655999999 is a deficient number, since it is larger than the sum of its proper divisors (605793281).

6655999999 is a wasteful number, since it uses less digits than its factorization.

6655999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58541.

The product of its digits is 478296900, while the sum is 76.

The square root of 6655999999 is about 81584.3122113559. The cubic root of 6655999999 is about 1881.0677500824.

It can be divided in two parts, 66 and 55999999, that added together give a palindrome (56000065).

The spelling of 6655999999 in words is "six billion, six hundred fifty-five million, nine hundred ninety-nine thousand, nine hundred ninety-nine".