664134612 has 24 divisors (see below), whose sum is σ = 1558214112. Its totient is φ = 220154400.

The previous prime is 664134599. The next prime is 664134617. The reversal of 664134612 is 216431466.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664134617) 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 7 ways as a sum of consecutive naturals, for example, 150714 + ... + 155057.

It is an arithmetic number, because the mean of its divisors is an integer number (64925588).

Almost surely, 2^664134612 is an apocalyptic number.

It is an amenable number.

664134612 is an abundant number, since it is smaller than the sum of its proper divisors (894079500).

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

664134612 is a wasteful number, since it uses less digits than its factorization.

664134612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305959 (or 305957 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 664134612 is about 25770.8093004469. The cubic root of 664134612 is about 872.4730848313.

The spelling of 664134612 in words is "six hundred sixty-four million, one hundred thirty-four thousand, six hundred twelve".