668321029 has 8 divisors (see below), whose sum is σ = 704363040. Its totient is φ = 632365776.

The previous prime is 668321021. The next prime is 668321041. The reversal of 668321029 is 920123866.

668321029 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 668321029 - 2³ = 668321021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668321021) 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, 5554 + ... + 36979.

It is an arithmetic number, because the mean of its divisors is an integer number (88045380).

Almost surely, 2^668321029 is an apocalyptic number.

It is an amenable number.

668321029 is a deficient number, since it is larger than the sum of its proper divisors (36042011).

668321029 is a wasteful number, since it uses less digits than its factorization.

668321029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43379.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 668321029 is about 25851.9057131191. The cubic root of 668321029 is about 874.3024771382.

The spelling of 668321029 in words is "six hundred sixty-eight million, three hundred twenty-one thousand, twenty-nine".