665152028227 has 4 divisors (see below), whose sum is σ = 665170580200. Its totient is φ = 665133476256.

The previous prime is 665152028207. The next prime is 665152028239. The reversal of 665152028227 is 722820251566.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665152028227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665152028207) 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, 9222102 + ... + 9293947.

It is an arithmetic number, because the mean of its divisors is an integer number (166292645050).

Almost surely, 2^665152028227 is an apocalyptic number.

665152028227 is a deficient number, since it is larger than the sum of its proper divisors (18551973).

665152028227 is a wasteful number, since it uses less digits than its factorization.

665152028227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18551972.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 665152028227 in words is "six hundred sixty-five billion, one hundred fifty-two million, twenty-eight thousand, two hundred twenty-seven".