664118125 has 40 divisors (see below), whose sum is σ = 936825120. Its totient is φ = 466200000.

The previous prime is 664118113. The next prime is 664118129. The reversal of 664118125 is 521811466.

It is not a de Polignac number, because 664118125 - 2⁷ = 664117997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664118129) 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 39 ways as a sum of consecutive naturals, for example, 197710 + ... + 201040.

It is an arithmetic number, because the mean of its divisors is an integer number (23420628).

Almost surely, 2^664118125 is an apocalyptic number.

It is an amenable number.

664118125 is a deficient number, since it is larger than the sum of its proper divisors (272706995).

664118125 is a wasteful number, since it uses less digits than its factorization.

664118125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391 (or 3376 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 664118125 is about 25770.4894210413. The cubic root of 664118125 is about 872.4658651189.

The spelling of 664118125 in words is "six hundred sixty-four million, one hundred eighteen thousand, one hundred twenty-five".