664328629 has 8 divisors (see below), whose sum is σ = 680201280. Its totient is φ = 648475296.

The previous prime is 664328593. The next prime is 664328671. The reversal of 664328629 is 926823466.

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 664328629 - 2⁷ = 664328501 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 (664323629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83889 + ... + 91465.

It is an arithmetic number, because the mean of its divisors is an integer number (85025160).

Almost surely, 2^664328629 is an apocalyptic number.

It is an amenable number.

664328629 is a deficient number, since it is larger than the sum of its proper divisors (15872651).

664328629 is a wasteful number, since it uses less digits than its factorization.

664328629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9659.

The product of its digits is 746496, while the sum is 46.

The square root of 664328629 is about 25774.5733039366. The cubic root of 664328629 is about 872.5580365496.

The spelling of 664328629 in words is "six hundred sixty-four million, three hundred twenty-eight thousand, six hundred twenty-nine".