6771960809 has 4 divisors (see below), whose sum is σ = 6776171220. Its totient is φ = 6767750400.

The previous prime is 6771960773. The next prime is 6771960821. The reversal of 6771960809 is 9080691776.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6392802025 + 379158784 = 79955^2 + 19472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6771960809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6771960869) 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, 2102792 + ... + 2106009.

It is an arithmetic number, because the mean of its divisors is an integer number (1694042805).

Almost surely, 2^6771960809 is an apocalyptic number.

It is an amenable number.

6771960809 is a deficient number, since it is larger than the sum of its proper divisors (4210411).

6771960809 is a wasteful number, since it uses less digits than its factorization.

6771960809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210410.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 6771960809 is about 82291.9243243224. The cubic root of 6771960809 is about 1891.9289032257.

The spelling of 6771960809 in words is "six billion, seven hundred seventy-one million, nine hundred sixty thousand, eight hundred nine".