664718201 has 8 divisors (see below), whose sum is σ = 759834624. Its totient is φ = 569640960.

The previous prime is 664718183. The next prime is 664718203. The reversal of 664718201 is 102817466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 664718201 - 2⁶ = 664718137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664718203) 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, 56441 + ... + 67193.

It is an arithmetic number, because the mean of its divisors is an integer number (94979328).

Almost surely, 2^664718201 is an apocalyptic number.

It is an amenable number.

664718201 is a deficient number, since it is larger than the sum of its proper divisors (95116423).

664718201 is a wasteful number, since it uses less digits than its factorization.

664718201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19591.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 664718201 is about 25782.1294892412. The cubic root of 664718201 is about 872.7285634750.

The spelling of 664718201 in words is "six hundred sixty-four million, seven hundred eighteen thousand, two hundred one".