6665727 has 4 divisors (see below), whose sum is σ = 8887640. Its totient is φ = 4443816.

The previous prime is 6665719. The next prime is 6665741. The reversal of 6665727 is 7275666.

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

It is not a de Polignac number, because 6665727 - 2³ = 6665719 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665707) 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 3 ways as a sum of consecutive naturals, for example, 1110952 + ... + 1110957.

It is an arithmetic number, because the mean of its divisors is an integer number (2221910).

Almost surely, 2^6665727 is an apocalyptic number.

6665727 is a deficient number, since it is larger than the sum of its proper divisors (2221913).

6665727 is a wasteful number, since it uses less digits than its factorization.

6665727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221912.

The product of its digits is 105840, while the sum is 39.

The square root of 6665727 is about 2581.8069253916. The cubic root of 6665727 is about 188.1983627588.

The spelling of 6665727 in words is "six million, six hundred sixty-five thousand, seven hundred twenty-seven".