6666168 has 16 divisors (see below), whose sum is σ = 16665480. Its totient is φ = 2222048.

The previous prime is 6666167. The next prime is 6666173. The reversal of 6666168 is 8616666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666167) 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, 138855 + ... + 138902.

Almost surely, 2^6666168 is an apocalyptic number.

It is an amenable number.

6666168 is an abundant number, since it is smaller than the sum of its proper divisors (9999312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6666168 is a wasteful number, since it uses less digits than its factorization.

6666168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277766 (or 277762 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 6666168 is about 2581.8923292810. The cubic root of 6666168 is about 188.2025130262.

The spelling of 6666168 in words is "six million, six hundred sixty-six thousand, one hundred sixty-eight".