1665327 has 4 divisors (see below), whose sum is σ = 2220440. Its totient is φ = 1110216.

The previous prime is 1665317. The next prime is 1665343. The reversal of 1665327 is 7235661.

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

It is not a de Polignac number, because 1665327 - 2⁴ = 1665311 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1665294 and 1665303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665317) 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, 277552 + ... + 277557.

It is an arithmetic number, because the mean of its divisors is an integer number (555110).

2^1665327 is an apocalyptic number.

1665327 is a deficient number, since it is larger than the sum of its proper divisors (555113).

1665327 is an equidigital number, since it uses as much as digits as its factorization.

1665327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555112.

The product of its digits is 7560, while the sum is 30.

The square root of 1665327 is about 1290.4754937619. The cubic root of 1665327 is about 118.5313346251.

The spelling of 1665327 in words is "one million, six hundred sixty-five thousand, three hundred twenty-seven".