6663423 has 8 divisors (see below), whose sum is σ = 9568048. Its totient is φ = 4100544.

The previous prime is 6663407. The next prime is 6663431. The reversal of 6663423 is 3243666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6663423 - 2⁴ = 6663407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85390 + ... + 85467.

It is an arithmetic number, because the mean of its divisors is an integer number (1196006).

Almost surely, 2^6663423 is an apocalyptic number.

6663423 is a deficient number, since it is larger than the sum of its proper divisors (2904625).

6663423 is a wasteful number, since it uses less digits than its factorization.

6663423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170873.

The product of its digits is 15552, while the sum is 30.

The square root of 6663423 is about 2581.3606876994. The cubic root of 6663423 is about 188.1766767524.

The spelling of 6663423 in words is "six million, six hundred sixty-three thousand, four hundred twenty-three".