669267009 has 8 divisors (see below), whose sum is σ = 991506720. Its totient is φ = 446177988.

The previous prime is 669266971. The next prime is 669267019. The reversal of 669267009 is 900762966.

It is not a de Polignac number, because 669267009 - 2⁹ = 669266497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669267019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12393807 + ... + 12393860.

It is an arithmetic number, because the mean of its divisors is an integer number (123938340).

Almost surely, 2^669267009 is an apocalyptic number.

It is an amenable number.

669267009 is a deficient number, since it is larger than the sum of its proper divisors (322239711).

669267009 is a wasteful number, since it uses less digits than its factorization.

669267009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24787676 (or 24787670 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 669267009 is about 25870.1953800121. The cubic root of 669267009 is about 874.7147953203.

The spelling of 669267009 in words is "six hundred sixty-nine million, two hundred sixty-seven thousand, nine".