6662111 has 4 divisors (see below), whose sum is σ = 6951792. Its totient is φ = 6372432.

The previous prime is 6662101. The next prime is 6662137. The reversal of 6662111 is 1112666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6662111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 289657 = 6662111 / (6 + 6 + 6 + 2 + 1 + 1 + 1).

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6662101) 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, 144806 + ... + 144851.

It is an arithmetic number, because the mean of its divisors is an integer number (1737948).

Almost surely, 2^6662111 is an apocalyptic number.

6662111 is a deficient number, since it is larger than the sum of its proper divisors (289681).

6662111 is a wasteful number, since it uses less digits than its factorization.

6662111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289680.

The product of its digits is 432, while the sum is 23.

The square root of 6662111 is about 2581.1065456505. The cubic root of 6662111 is about 188.1643255426.

Adding to 6662111 its reverse (1112666), we get a palindrome (7774777).

The spelling of 6662111 in words is "six million, six hundred sixty-two thousand, one hundred eleven".