669714065 has 8 divisors (see below), whose sum is σ = 850930920. Its totient is φ = 504255232.

The previous prime is 669714043. The next prime is 669714077. The reversal of 669714065 is 560417966.

It is a happy number.

669714065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 18800896 + 650913169 = 4336^2 + 25513^2 .

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 669714065 - 2⁸ = 669713809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3939410 + ... + 3939579.

It is an arithmetic number, because the mean of its divisors is an integer number (106366365).

Almost surely, 2^669714065 is an apocalyptic number.

It is an amenable number.

669714065 is a deficient number, since it is larger than the sum of its proper divisors (181216855).

669714065 is a wasteful number, since it uses less digits than its factorization.

669714065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7879011.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 669714065 is about 25878.8343052774. The cubic root of 669714065 is about 874.9095155412.

The spelling of 669714065 in words is "six hundred sixty-nine million, seven hundred fourteen thousand, sixty-five".