669007817 has 16 divisors (see below), whose sum is σ = 725127552. Its totient is φ = 614864640.

The previous prime is 669007811. The next prime is 669007847. The reversal of 669007817 is 718700966.

It is a cyclic number.

It is not a de Polignac number, because 669007817 - 2⁸ = 669007561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669007811) 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 15 ways as a sum of consecutive naturals, for example, 202892 + ... + 206162.

It is an arithmetic number, because the mean of its divisors is an integer number (45320472).

Almost surely, 2^669007817 is an apocalyptic number.

It is an amenable number.

669007817 is a deficient number, since it is larger than the sum of its proper divisors (56119735).

669007817 is a wasteful number, since it uses less digits than its factorization.

669007817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 669007817 is about 25865.1854236539. The cubic root of 669007817 is about 874.6018616440.

The spelling of 669007817 in words is "six hundred sixty-nine million, seven thousand, eight hundred seventeen".