664344135 has 96 divisors (see below), whose sum is σ = 1444480128. Its totient is φ = 274959360.

The previous prime is 664344133. The next prime is 664344137. The reversal of 664344135 is 531443466.

664344135 is a `hidden beast` number, since 6 + 643 + 4 + 4 + 1 + 3 + 5 = 666.

664344135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (664344133) and next prime (664344137).

It is not a de Polignac number, because 664344135 - 2¹ = 664344133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664344135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664344133) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 215505 + ... + 218565.

It is an arithmetic number, because the mean of its divisors is an integer number (15046668).

Almost surely, 2^664344135 is an apocalyptic number.

664344135 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

664344135 is an abundant number, since it is smaller than the sum of its proper divisors (780135993).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664344135 is a wasteful number, since it uses less digits than its factorization.

664344135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145 (or 3142 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 664344135 is about 25774.8741025053. The cubic root of 664344135 is about 872.5648252478.

The spelling of 664344135 in words is "six hundred sixty-four million, three hundred forty-four thousand, one hundred thirty-five".