6668923 has 4 divisors (see below), whose sum is σ = 6675480. Its totient is φ = 6662368.

The previous prime is 6668911. The next prime is 6668939. The reversal of 6668923 is 3298666.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6668923 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6668903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390 + ... + 3907.

It is an arithmetic number, because the mean of its divisors is an integer number (1668870).

Almost surely, 2^6668923 is an apocalyptic number.

6668923 is a deficient number, since it is larger than the sum of its proper divisors (6557).

6668923 is a wasteful number, since it uses less digits than its factorization.

6668923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6556.

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

The square root of 6668923 is about 2582.4257975787. The cubic root of 6668923 is about 188.2284362908.

The spelling of 6668923 in words is "six million, six hundred sixty-eight thousand, nine hundred twenty-three".