665258227 has 4 divisors (see below), whose sum is σ = 667625976. Its totient is φ = 662890480.

The previous prime is 665258219. The next prime is 665258239. The reversal of 665258227 is 722852566.

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 665258227 - 2³ = 665258219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665258207) 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, 1183453 + ... + 1184014.

It is an arithmetic number, because the mean of its divisors is an integer number (166906494).

Almost surely, 2^665258227 is an apocalyptic number.

665258227 is a deficient number, since it is larger than the sum of its proper divisors (2367749).

665258227 is a wasteful number, since it uses less digits than its factorization.

665258227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367748.

The product of its digits is 403200, while the sum is 43.

The square root of 665258227 is about 25792.6002372774. The cubic root of 665258227 is about 872.9648383069.

The spelling of 665258227 in words is "six hundred sixty-five million, two hundred fifty-eight thousand, two hundred twenty-seven".