6666611 has 8 divisors (see below), whose sum is σ = 7680000. Its totient is φ = 5668488.

The previous prime is 6666599. The next prime is 6666613. The reversal of 6666611 is 1166666.

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

It is not a de Polignac number, because 6666611 - 2⁶ = 6666547 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6666613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2861 + ... + 4638.

It is an arithmetic number, because the mean of its divisors is an integer number (960000).

Almost surely, 2^6666611 is an apocalyptic number.

6666611 is a deficient number, since it is larger than the sum of its proper divisors (1013389).

6666611 is a wasteful number, since it uses less digits than its factorization.

6666611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7633.

The product of its digits is 7776, while the sum is 32.

The square root of 6666611 is about 2581.9781176455. The cubic root of 6666611 is about 188.2066819314.

Subtracting from 6666611 its reverse (1166666), we obtain a palindrome (5499945).

The spelling of 6666611 in words is "six million, six hundred sixty-six thousand, six hundred eleven".