664025360 has 20 divisors (see below), whose sum is σ = 1543859148. Its totient is φ = 265610112.

The previous prime is 664025303. The next prime is 664025371. The reversal of 664025360 is 63520466.

It can be written as a sum of positive squares in 2 ways, for example, as 110082064 + 553943296 = 10492^2 + 23536^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4150079 + ... + 4150238.

Almost surely, 2^664025360 is an apocalyptic number.

It is an amenable number.

664025360 is an abundant number, since it is smaller than the sum of its proper divisors (879833788).

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

664025360 is a wasteful number, since it uses less digits than its factorization.

664025360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8300330 (or 8300324 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 664025360 is about 25768.6895281852. The cubic root of 664025360 is about 872.4252407873.

The spelling of 664025360 in words is "six hundred sixty-four million, twenty-five thousand, three hundred sixty".