6691837271 has 4 divisors (see below), whose sum is σ = 7647814032. Its totient is φ = 5735860512.

The previous prime is 6691837267. The next prime is 6691837291. The reversal of 6691837271 is 1727381966.

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 6691837271 - 2² = 6691837267 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691837291) 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, 477988370 + ... + 477988383.

It is an arithmetic number, because the mean of its divisors is an integer number (1911953508).

Almost surely, 2^6691837271 is an apocalyptic number.

6691837271 is a deficient number, since it is larger than the sum of its proper divisors (955976761).

6691837271 is an equidigital number, since it uses as much as digits as its factorization.

6691837271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955976760.

The product of its digits is 762048, while the sum is 50.

The square root of 6691837271 is about 81803.6507192680. The cubic root of 6691837271 is about 1884.4377275431.

The spelling of 6691837271 in words is "six billion, six hundred ninety-one million, eight hundred thirty-seven thousand, two hundred seventy-one".