6666998 has 8 divisors (see below), whose sum is σ = 10769808. Its totient is φ = 3077064.

The previous prime is 6666991. The next prime is 6667019. The reversal of 6666998 is 8996666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666991) 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, 128186 + ... + 128237.

It is an arithmetic number, because the mean of its divisors is an integer number (1346226).

Almost surely, 2^6666998 is an apocalyptic number.

6666998 is a deficient number, since it is larger than the sum of its proper divisors (4102810).

6666998 is a wasteful number, since it uses less digits than its factorization.

6666998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256438.

The product of its digits is 839808, while the sum is 50.

The square root of 6666998 is about 2582.0530590985. The cubic root of 6666998 is about 188.2103236906.

The spelling of 6666998 in words is "six million, six hundred sixty-six thousand, nine hundred ninety-eight".