6691438 has 16 divisors (see below), whose sum is σ = 11445840. Its totient is φ = 2906496.

The previous prime is 6691427. The next prime is 6691457. The reversal of 6691438 is 8341966.

It is a junction number, because it is equal to n+sod(n) for n = 6691397 and 6691406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7128 + ... + 8011.

It is an arithmetic number, because the mean of its divisors is an integer number (715365).

Almost surely, 2^6691438 is an apocalyptic number.

6691438 is a deficient number, since it is larger than the sum of its proper divisors (4754402).

6691438 is a wasteful number, since it uses less digits than its factorization.

6691438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15171.

The product of its digits is 31104, while the sum is 37.

The square root of 6691438 is about 2586.7813977992. The cubic root of 6691438 is about 188.4400248235.

The spelling of 6691438 in words is "six million, six hundred ninety-one thousand, four hundred thirty-eight".