6691343 has 4 divisors (see below), whose sum is σ = 6833760. Its totient is φ = 6548928.

The previous prime is 6691337. The next prime is 6691361. The reversal of 6691343 is 3431966.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3431966 = 2 ⋅1715983.

It is a cyclic number.

It is not a de Polignac number, because 6691343 - 2¹⁰ = 6690319 is a prime.

It is a super-2 number, since 2×6691343² = 89548142287298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71138 + ... + 71231.

It is an arithmetic number, because the mean of its divisors is an integer number (1708440).

Almost surely, 2^6691343 is an apocalyptic number.

6691343 is a deficient number, since it is larger than the sum of its proper divisors (142417).

6691343 is a wasteful number, since it uses less digits than its factorization.

6691343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142416.

The product of its digits is 11664, while the sum is 32.

The square root of 6691343 is about 2586.7630351464. The cubic root of 6691343 is about 188.4391330427.

The spelling of 6691343 in words is "six million, six hundred ninety-one thousand, three hundred forty-three".