6684223391 has 4 divisors (see below), whose sum is σ = 6721152984. Its totient is φ = 6647293800.

The previous prime is 6684223367. The next prime is 6684223397. The reversal of 6684223391 is 1933224866.

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 6684223391 - 2⁶ = 6684223327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6684223397) 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, 18464525 + ... + 18464886.

It is an arithmetic number, because the mean of its divisors is an integer number (1680288246).

Almost surely, 2^6684223391 is an apocalyptic number.

6684223391 is a deficient number, since it is larger than the sum of its proper divisors (36929593).

6684223391 is a wasteful number, since it uses less digits than its factorization.

6684223391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36929592.

The product of its digits is 373248, while the sum is 44.

The square root of 6684223391 is about 81757.0999424515. The cubic root of 6684223391 is about 1883.7227605769.

The spelling of 6684223391 in words is "six billion, six hundred eighty-four million, two hundred twenty-three thousand, three hundred ninety-one".