664134160 has 20 divisors (see below), whose sum is σ = 1544112108. Its totient is φ = 265653632.

The previous prime is 664134157. The next prime is 664134161. The reversal of 664134160 is 61431466.

It can be written as a sum of positive squares in 2 ways, for example, as 253828624 + 410305536 = 15932^2 + 20256^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (664134161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4150759 + ... + 4150918.

Almost surely, 2^664134160 is an apocalyptic number.

It is an amenable number.

664134160 is an abundant number, since it is smaller than the sum of its proper divisors (879977948).

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

664134160 is a wasteful number, since it uses less digits than its factorization.

664134160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8301690 (or 8301684 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 664134160 is about 25770.8005308333. The cubic root of 664134160 is about 872.4728869006.

The spelling of 664134160 in words is "six hundred sixty-four million, one hundred thirty-four thousand, one hundred sixty".