665331227 has 32 divisors (see below), whose sum is σ = 813888000. Its totient is φ = 536025600.

The previous prime is 665331221. The next prime is 665331229. The reversal of 665331227 is 722133566.

It is not a de Polignac number, because 665331227 - 2⁴ = 665331211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665331221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 706577 + ... + 707517.

It is an arithmetic number, because the mean of its divisors is an integer number (25434000).

Almost surely, 2^665331227 is an apocalyptic number.

665331227 is a deficient number, since it is larger than the sum of its proper divisors (148556773).

665331227 is a wasteful number, since it uses less digits than its factorization.

665331227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187.

The product of its digits is 45360, while the sum is 35.

The square root of 665331227 is about 25794.0153330186. The cubic root of 665331227 is about 872.9967678143.

The spelling of 665331227 in words is "six hundred sixty-five million, three hundred thirty-one thousand, two hundred twenty-seven".