6655813181 has 4 divisors (see below), whose sum is σ = 6870516864. Its totient is φ = 6441109500.

The previous prime is 6655813147. The next prime is 6655813217. The reversal of 6655813181 is 1813185566.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6655813181 is a prime.

It is a super-2 number, since 2×6655813181² = 88599698200746677522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6655813081) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107351795 + ... + 107351856.

It is an arithmetic number, because the mean of its divisors is an integer number (1717629216).

Almost surely, 2^6655813181 is an apocalyptic number.

It is an amenable number.

6655813181 is a deficient number, since it is larger than the sum of its proper divisors (214703683).

6655813181 is a wasteful number, since it uses less digits than its factorization.

6655813181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214703682.

The product of its digits is 172800, while the sum is 44.

The square root of 6655813181 is about 81583.1672650676. The cubic root of 6655813181 is about 1881.0501508936.

The spelling of 6655813181 in words is "six billion, six hundred fifty-five million, eight hundred thirteen thousand, one hundred eighty-one".