668029109 has 8 divisors (see below), whose sum is σ = 729239520. Its totient is φ = 606898800.

The previous prime is 668029099. The next prime is 668029111. The reversal of 668029109 is 901920866.

668029109 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 a de Polignac number, because none of the positive numbers 2^k-668029109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668029169) 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, 1862 + ... + 36599.

It is an arithmetic number, because the mean of its divisors is an integer number (91154940).

Almost surely, 2^668029109 is an apocalyptic number.

It is an amenable number.

668029109 is a deficient number, since it is larger than the sum of its proper divisors (61210411).

668029109 is a wasteful number, since it uses less digits than its factorization.

668029109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40051.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 668029109 is about 25846.2590910174. The cubic root of 668029109 is about 874.1751613036.

The spelling of 668029109 in words is "six hundred sixty-eight million, twenty-nine thousand, one hundred nine".