669109321 has 8 divisors (see below), whose sum is σ = 676168064. Its totient is φ = 662061600.

The previous prime is 669109277. The next prime is 669109327. The reversal of 669109321 is 123901966.

669109321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 669109321 - 2⁹ = 669108809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669109327) 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, 183700 + ... + 187306.

It is an arithmetic number, because the mean of its divisors is an integer number (84521008).

Almost surely, 2^669109321 is an apocalyptic number.

It is an amenable number.

669109321 is a deficient number, since it is larger than the sum of its proper divisors (7058743).

669109321 is a wasteful number, since it uses less digits than its factorization.

669109321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5511.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 669109321 is about 25867.1475234514. The cubic root of 669109321 is about 874.6460918685.

The spelling of 669109321 in words is "six hundred sixty-nine million, one hundred nine thousand, three hundred twenty-one".