6716776643 has 4 divisors (see below), whose sum is σ = 6717237048. Its totient is φ = 6716316240.

The previous prime is 6716776609. The next prime is 6716776663. The reversal of 6716776643 is 3466776176.

6716776643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6716776643 - 2²⁰ = 6715728067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6716776663) 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, 207578 + ... + 237743.

It is an arithmetic number, because the mean of its divisors is an integer number (1679309262).

Almost surely, 2^6716776643 is an apocalyptic number.

6716776643 is a deficient number, since it is larger than the sum of its proper divisors (460405).

6716776643 is a wasteful number, since it uses less digits than its factorization.

6716776643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460404.

The product of its digits is 5334336, while the sum is 53.

The square root of 6716776643 is about 81955.9433049245. The cubic root of 6716776643 is about 1886.7758214131.

The spelling of 6716776643 in words is "six billion, seven hundred sixteen million, seven hundred seventy-six thousand, six hundred forty-three".