6666111 has 16 divisors (see below), whose sum is σ = 9948000. Its totient is φ = 4411584.

The previous prime is 6666097. The next prime is 6666133. The reversal of 6666111 is 1116666.

It is not a de Polignac number, because 6666111 - 2⁶ = 6666047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3195 + ... + 4851.

It is an arithmetic number, because the mean of its divisors is an integer number (621750).

Almost surely, 2^6666111 is an apocalyptic number.

6666111 is a deficient number, since it is larger than the sum of its proper divisors (3281889).

6666111 is a wasteful number, since it uses less digits than its factorization.

6666111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815 (or 1809 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 6666111 is about 2581.8812908420. The cubic root of 6666111 is about 188.2019766074.

The spelling of 6666111 in words is "six million, six hundred sixty-six thousand, one hundred eleven".