6673999 has 4 divisors (see below), whose sum is σ = 6758560. Its totient is φ = 6589440.

The previous prime is 6673993. The next prime is 6674009. The reversal of 6673999 is 9993766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9993766 = 2 ⋅4996883.

It is a cyclic number.

It is not a de Polignac number, because 6673999 - 2³ = 6673991 is a prime.

It is an Ulam number.

It is a Duffinian number.

6673999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6673991) 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, 42162 + ... + 42319.

It is an arithmetic number, because the mean of its divisors is an integer number (1689640).

Almost surely, 2^6673999 is an apocalyptic number.

6673999 is a deficient number, since it is larger than the sum of its proper divisors (84561).

6673999 is an equidigital number, since it uses as much as digits as its factorization.

6673999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84560.

The product of its digits is 551124, while the sum is 49.

The square root of 6673999 is about 2583.4084075113. The cubic root of 6673999 is about 188.2761803936.

The spelling of 6673999 in words is "six million, six hundred seventy-three thousand, nine hundred ninety-nine".