664241357 has 24 divisors (see below), whose sum is σ = 793032576. Its totient is φ = 551916288.

The previous prime is 664241297. The next prime is 664241359. The reversal of 664241357 is 753142466.

It is a happy number.

It is not a de Polignac number, because 664241357 - 2¹⁰ = 664240333 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664241357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664241359) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82568 + ... + 90254.

It is an arithmetic number, because the mean of its divisors is an integer number (33043024).

Almost surely, 2^664241357 is an apocalyptic number.

It is an amenable number.

664241357 is a deficient number, since it is larger than the sum of its proper divisors (128791219).

664241357 is a wasteful number, since it uses less digits than its factorization.

664241357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7757 (or 7740 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 664241357 is about 25772.8802620118. The cubic root of 664241357 is about 872.5198259330.

The spelling of 664241357 in words is "six hundred sixty-four million, two hundred forty-one thousand, three hundred fifty-seven".