6684436691349 has 4 divisors (see below), whose sum is σ = 8912582255136. Its totient is φ = 4456291127564.

The previous prime is 6684436691269. The next prime is 6684436691351. The reversal of 6684436691349 is 9431966344866.

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 not a de Polignac number, because 6684436691349 - 2¹⁶ = 6684436625813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6684436691749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1114072781889 + ... + 1114072781894.

It is an arithmetic number, because the mean of its divisors is an integer number (2228145563784).

Almost surely, 2^{6684436691349} is an apocalyptic number.

It is an amenable number.

6684436691349 is a deficient number, since it is larger than the sum of its proper divisors (2228145563787).

6684436691349 is a wasteful number, since it uses less digits than its factorization.

6684436691349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228145563786.

The product of its digits is 483729408, while the sum is 69.

The spelling of 6684436691349 in words is "six trillion, six hundred eighty-four billion, four hundred thirty-six million, six hundred ninety-one thousand, three hundred forty-nine".