664223601 has 8 divisors (see below), whose sum is σ = 924137280. Its totient is φ = 423562832.

The previous prime is 664223587. The next prime is 664223611. The reversal of 664223601 is 106322466.

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 664223601 - 2¹⁸ = 663961457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664223611) 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 7 ways as a sum of consecutive naturals, for example, 4813146 + ... + 4813283.

It is an arithmetic number, because the mean of its divisors is an integer number (115517160).

Almost surely, 2^664223601 is an apocalyptic number.

It is an amenable number.

664223601 is a deficient number, since it is larger than the sum of its proper divisors (259913679).

664223601 is a wasteful number, since it uses less digits than its factorization.

664223601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9626455.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 664223601 is about 25772.5357890915. The cubic root of 664223601 is about 872.5120513493.

The spelling of 664223601 in words is "six hundred sixty-four million, two hundred twenty-three thousand, six hundred one".