6691437 has 16 divisors (see below), whose sum is σ = 10126080. Its totient is φ = 4365216.

The previous prime is 6691427. The next prime is 6691457. The reversal of 6691437 is 7341966.

6691437 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6691437 - 2⁷ = 6691309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1368 + ... + 3905.

It is an arithmetic number, because the mean of its divisors is an integer number (632880).

Almost surely, 2^6691437 is an apocalyptic number.

It is an amenable number.

6691437 is a deficient number, since it is larger than the sum of its proper divisors (3434643).

6691437 is a wasteful number, since it uses less digits than its factorization.

6691437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5329 (or 5323 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 6691437 is about 2586.7812045088. The cubic root of 6691437 is about 188.4400154363.

The spelling of 6691437 in words is "six million, six hundred ninety-one thousand, four hundred thirty-seven".