664221353 has 8 divisors (see below), whose sum is σ = 672230208. Its totient is φ = 656242704.

The previous prime is 664221293. The next prime is 664221359. The reversal of 664221353 is 353122466.

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-664221353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664221359) 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, 38351 + ... + 52907.

It is an arithmetic number, because the mean of its divisors is an integer number (84028776).

Almost surely, 2^664221353 is an apocalyptic number.

It is an amenable number.

664221353 is a deficient number, since it is larger than the sum of its proper divisors (8008855).

664221353 is a wasteful number, since it uses less digits than its factorization.

664221353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15103.

The product of its digits is 25920, while the sum is 32.

The square root of 664221353 is about 25772.4921767376. The cubic root of 664221353 is about 872.5110670375.

The spelling of 664221353 in words is "six hundred sixty-four million, two hundred twenty-one thousand, three hundred fifty-three".