665153327 has 4 divisors (see below), whose sum is σ = 665946960. Its totient is φ = 664359696.

The previous prime is 665153323. The next prime is 665153381. The reversal of 665153327 is 723351566.

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

It is a cyclic number.

It is not a de Polignac number, because 665153327 - 2² = 665153323 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 (665153323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395558 + ... + 397235.

It is an arithmetic number, because the mean of its divisors is an integer number (166486740).

Almost surely, 2^665153327 is an apocalyptic number.

665153327 is a deficient number, since it is larger than the sum of its proper divisors (793633).

665153327 is an equidigital number, since it uses as much as digits as its factorization.

665153327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793632.

The product of its digits is 113400, while the sum is 38.

The square root of 665153327 is about 25790.5666281298. The cubic root of 665153327 is about 872.9189519521.

The spelling of 665153327 in words is "six hundred sixty-five million, one hundred fifty-three thousand, three hundred twenty-seven".