669340009 has 8 divisors (see below), whose sum is σ = 721064960. Its totient is φ = 617648976.

The previous prime is 669339989. The next prime is 669340051. The reversal of 669340009 is 900043966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 669340009 - 2¹¹ = 669337961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 669340009.

It is not an unprimeable number, because it can be changed into a prime (669340079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45082 + ... + 58060.

It is an arithmetic number, because the mean of its divisors is an integer number (90133120).

Almost surely, 2^669340009 is an apocalyptic number.

It is an amenable number.

669340009 is a deficient number, since it is larger than the sum of its proper divisors (51724951).

669340009 is a wasteful number, since it uses less digits than its factorization.

669340009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16959.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 669340009 is about 25871.6062315427. The cubic root of 669340009 is about 874.7465972059.

The spelling of 669340009 in words is "six hundred sixty-nine million, three hundred forty thousand, nine".