669303217 has 4 divisors (see below), whose sum is σ = 730148976. Its totient is φ = 608457460.

The previous prime is 669303199. The next prime is 669303227. The reversal of 669303217 is 712303966.

669303217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 669303217 - 2¹⁵ = 669270449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669303227) 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, 30422863 + ... + 30422884.

It is an arithmetic number, because the mean of its divisors is an integer number (182537244).

Almost surely, 2^669303217 is an apocalyptic number.

It is an amenable number.

669303217 is a deficient number, since it is larger than the sum of its proper divisors (60845759).

669303217 is a wasteful number, since it uses less digits than its factorization.

669303217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60845758.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 669303217 is about 25870.8951719882. The cubic root of 669303217 is about 874.7305693445.

The spelling of 669303217 in words is "six hundred sixty-nine million, three hundred three thousand, two hundred seventeen".