6669823 has 4 divisors (see below), whose sum is σ = 6696648. Its totient is φ = 6643000.

The previous prime is 6669809. The next prime is 6669827. The reversal of 6669823 is 3289666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6669823 - 2²¹ = 4572671 is a prime.

It is a Duffinian number.

6669823 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669827) 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, 13036 + ... + 13537.

It is an arithmetic number, because the mean of its divisors is an integer number (1674162).

Almost surely, 2^6669823 is an apocalyptic number.

6669823 is a deficient number, since it is larger than the sum of its proper divisors (26825).

6669823 is a wasteful number, since it uses less digits than its factorization.

6669823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26824.

The product of its digits is 93312, while the sum is 40.

The square root of 6669823 is about 2582.6000464648. The cubic root of 6669823 is about 188.2369033238.

The spelling of 6669823 in words is "six million, six hundred sixty-nine thousand, eight hundred twenty-three".