664432363 has 4 divisors (see below), whose sum is σ = 759351280. Its totient is φ = 569513448.

The previous prime is 664432339. The next prime is 664432399. The reversal of 664432363 is 363234466.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 664432363 - 2⁹ = 664431851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664432333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47459448 + ... + 47459461.

It is an arithmetic number, because the mean of its divisors is an integer number (189837820).

Almost surely, 2^664432363 is an apocalyptic number.

664432363 is a deficient number, since it is larger than the sum of its proper divisors (94918917).

664432363 is an equidigital number, since it uses as much as digits as its factorization.

664432363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94918916.

The product of its digits is 186624, while the sum is 37.

The square root of 664432363 is about 25776.5855574395. The cubic root of 664432363 is about 872.6034504310.

The spelling of 664432363 in words is "six hundred sixty-four million, four hundred thirty-two thousand, three hundred sixty-three".