6684538481 has 4 divisors (see below), whose sum is σ = 6826762752. Its totient is φ = 6542314212.

The previous prime is 6684538439. The next prime is 6684538493. The reversal of 6684538481 is 1848354866.

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 not a de Polignac number, because 6684538481 - 2³⁰ = 5610796657 is a prime.

It is a super-2 number, since 2×6684538481² = 89366109407939574722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6684537481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71112065 + ... + 71112158.

It is an arithmetic number, because the mean of its divisors is an integer number (1706690688).

Almost surely, 2^6684538481 is an apocalyptic number.

It is an amenable number.

6684538481 is a deficient number, since it is larger than the sum of its proper divisors (142224271).

6684538481 is a wasteful number, since it uses less digits than its factorization.

6684538481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142224270.

The product of its digits is 4423680, while the sum is 53.

The square root of 6684538481 is about 81759.0269083482. The cubic root of 6684538481 is about 1883.7523592724.

The spelling of 6684538481 in words is "six billion, six hundred eighty-four million, five hundred thirty-eight thousand, four hundred eighty-one".