6682540921 has 16 divisors (see below), whose sum is σ = 7670376576. Its totient is φ = 5703054336.

The previous prime is 6682540913. The next prime is 6682540967. The reversal of 6682540921 is 1290452866.

6682540921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6682540921 - 2³ = 6682540913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6682540121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2128665 + ... + 2131801.

It is an arithmetic number, because the mean of its divisors is an integer number (479398536).

Almost surely, 2^6682540921 is an apocalyptic number.

It is an amenable number.

6682540921 is a deficient number, since it is larger than the sum of its proper divisors (987835655).

6682540921 is a wasteful number, since it uses less digits than its factorization.

6682540921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4368.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 6682540921 is about 81746.8098521282. The cubic root of 6682540921 is about 1883.5646981864.

The spelling of 6682540921 in words is "six billion, six hundred eighty-two million, five hundred forty thousand, nine hundred twenty-one".