6666668 has 12 divisors (see below), whose sum is σ = 11915232.
Its totient is φ = 3262320.
The previous prime is 6666617. The next prime is 6666679. The reversal of 6666668 is 8666666.
Multipling 6666668 by its sum of digits (44), we get a palindrome (293333392).
It is a happy number.
It is a plaindrome in base 10.
It is an unprimeable number.
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, 17543 + ... + 17918.
It is an arithmetic number, because the mean of its divisors is an integer number (992936).
Almost surely, 26666668 is an apocalyptic number.
It is an amenable number.
6666668 is a deficient number, since it is larger than the sum of its proper divisors (5248564).
6666668 is a wasteful number, since it uses less digits than its factorization.
6666668 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 35512 (or 35510 counting only the distinct ones).
The product of its digits is 373248, while the sum is 44.
The square root of 6666668 is about 2581.9891556705.
The cubic root of 6666668 is about 188.2072183234.
The spelling of 6666668 in words is "six million, six hundred sixty-six thousand, six hundred sixty-eight".