6655729219 has 4 divisors (see below), whose sum is σ = 6818064120. Its totient is φ = 6493394320.

The previous prime is 6655729181. The next prime is 6655729231. The reversal of 6655729219 is 9129275566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6655729219 - 2¹³ = 6655721027 is a prime.

It is a super-2 number, since 2×6655729219² = 88597462873300699922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6655729019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81167389 + ... + 81167470.

It is an arithmetic number, because the mean of its divisors is an integer number (1704516030).

Almost surely, 2^6655729219 is an apocalyptic number.

6655729219 is a deficient number, since it is larger than the sum of its proper divisors (162334901).

6655729219 is a wasteful number, since it uses less digits than its factorization.

6655729219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162334900.

The product of its digits is 2041200, while the sum is 52.

The square root of 6655729219 is about 81582.6526842564. The cubic root of 6655729219 is about 1881.0422411465.

The spelling of 6655729219 in words is "six billion, six hundred fifty-five million, seven hundred twenty-nine thousand, two hundred nineteen".