6665911 has 12 divisors (see below), whose sum is σ = 8023320. Its totient is φ = 5515440.

The previous prime is 6665909. The next prime is 6665917. The reversal of 6665911 is 1195666.

It is not a de Polignac number, because 6665911 - 2¹ = 6665909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 925 + ... + 3766.

It is an arithmetic number, because the mean of its divisors is an integer number (668610).

Almost surely, 2^6665911 is an apocalyptic number.

6665911 is a deficient number, since it is larger than the sum of its proper divisors (1357409).

6665911 is a wasteful number, since it uses less digits than its factorization.

6665911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4734 (or 4727 counting only the distinct ones).

The product of its digits is 9720, while the sum is 34.

The square root of 6665911 is about 2581.8425591039. The cubic root of 6665911 is about 188.2000944119.

The spelling of 6665911 in words is "six million, six hundred sixty-five thousand, nine hundred eleven".