6666788 has 12 divisors (see below), whose sum is σ = 12353292. Its totient is φ = 3137280.

The previous prime is 6666769. The next prime is 6666791. The reversal of 6666788 is 8876666.

It can be written as a sum of positive squares in 2 ways, for example, as 5207524 + 1459264 = 2282^2 + 1208^2 .

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48953 + ... + 49088.

It is an arithmetic number, because the mean of its divisors is an integer number (1029441).

Almost surely, 2^6666788 is an apocalyptic number.

6666788 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6666788 is a deficient number, since it is larger than the sum of its proper divisors (5686504).

6666788 is a wasteful number, since it uses less digits than its factorization.

6666788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98062 (or 98060 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 6666788 is about 2582.0123934637. The cubic root of 6666788 is about 188.2083475597.

The spelling of 6666788 in words is "six million, six hundred sixty-six thousand, seven hundred eighty-eight".