6671691 has 24 divisors (see below), whose sum is σ = 10483200. Its totient is φ = 4064256.

The previous prime is 6671683. The next prime is 6671713. The reversal of 6671691 is 1961766.

It is not a de Polignac number, because 6671691 - 2³ = 6671683 is a prime.

It is a super-2 number, since 2×6671691² = 89022921598962, which contains 22 as substring.

6671691 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6671671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14635 + ... + 15083.

It is an arithmetic number, because the mean of its divisors is an integer number (436800).

Almost surely, 2^6671691 is an apocalyptic number.

6671691 is a deficient number, since it is larger than the sum of its proper divisors (3811509).

6671691 is a wasteful number, since it uses less digits than its factorization.

6671691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595 (or 592 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 6671691 is about 2582.9616721895. The cubic root of 6671691 is about 188.2544746903.

The spelling of 6671691 in words is "six million, six hundred seventy-one thousand, six hundred ninety-one".