6691271 has 4 divisors (see below), whose sum is σ = 6696912. Its totient is φ = 6685632.

The previous prime is 6691259. The next prime is 6691277. The reversal of 6691271 is 1721966.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6691271 - 2⁶ = 6691207 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691277) 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, 275 + ... + 3668.

It is an arithmetic number, because the mean of its divisors is an integer number (1674228).

Almost surely, 2^6691271 is an apocalyptic number.

6691271 is a deficient number, since it is larger than the sum of its proper divisors (5641).

6691271 is a wasteful number, since it uses less digits than its factorization.

6691271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5640.

The product of its digits is 4536, while the sum is 32.

The square root of 6691271 is about 2586.7491181017. The cubic root of 6691271 is about 188.4384571611.

The spelling of 6691271 in words is "six million, six hundred ninety-one thousand, two hundred seventy-one".