669197227 has 4 divisors (see below), whose sum is σ = 669271456. Its totient is φ = 669123000.

The previous prime is 669197219. The next prime is 669197237. The reversal of 669197227 is 722791966.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 669197227 - 2³ = 669197219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669197237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21363 + ... + 42364.

It is an arithmetic number, because the mean of its divisors is an integer number (167317864).

Almost surely, 2^669197227 is an apocalyptic number.

669197227 is a deficient number, since it is larger than the sum of its proper divisors (74229).

669197227 is a wasteful number, since it uses less digits than its factorization.

669197227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74228.

The product of its digits is 571536, while the sum is 49.

The square root of 669197227 is about 25868.8466499765. The cubic root of 669197227 is about 874.6843931695.

The spelling of 669197227 in words is "six hundred sixty-nine million, one hundred ninety-seven thousand, two hundred twenty-seven".