6687433 has 4 divisors (see below), whose sum is σ = 6709248. Its totient is φ = 6665620.

The previous prime is 6687427. The next prime is 6687437. The reversal of 6687433 is 3347866.

It is a happy number.

6687433 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3347866 = 2 ⋅1673933.

It is a cyclic number.

It is not a de Polignac number, because 6687433 - 2⁹ = 6686921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6687392 and 6687401.

It is not an unprimeable number, because it can be changed into a prime (6687437) 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, 10441 + ... + 11062.

It is an arithmetic number, because the mean of its divisors is an integer number (1677312).

Almost surely, 2^6687433 is an apocalyptic number.

It is an amenable number.

6687433 is a deficient number, since it is larger than the sum of its proper divisors (21815).

6687433 is a wasteful number, since it uses less digits than its factorization.

6687433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21814.

The product of its digits is 72576, while the sum is 37.

The square root of 6687433 is about 2586.0071538958. The cubic root of 6687433 is about 188.4024218987.

Subtracting from 6687433 its sum of digits (37), we obtain a square (6687396 = 2586²).

It can be divided in two parts, 668743 and 3, that added together give a triangular number (668746 = T₁₁₅₆).

The spelling of 6687433 in words is "six million, six hundred eighty-seven thousand, four hundred thirty-three".