665223777012227 has 4 divisors (see below), whose sum is σ = 665224701293976. Its totient is φ = 665222852730480.

The previous prime is 665223777012203. The next prime is 665223777012241. The reversal of 665223777012227 is 722210777322566.

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 665223777012227 - 2¹⁶ = 665223776946691 is a prime.

It is a super-2 number, since 2×665223777012227² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665223777012127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461060453 + ... + 462501014.

It is an arithmetic number, because the mean of its divisors is an integer number (166306175323494).

Almost surely, 2^{665223777012227} is an apocalyptic number.

665223777012227 is a deficient number, since it is larger than the sum of its proper divisors (924281749).

665223777012227 is an equidigital number, since it uses as much as digits as its factorization.

665223777012227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924281748.

The product of its (nonzero) digits is 41489280, while the sum is 59.

The spelling of 665223777012227 in words is "six hundred sixty-five trillion, two hundred twenty-three billion, seven hundred seventy-seven million, twelve thousand, two hundred twenty-seven".