664005027 has 48 divisors (see below), whose sum is σ = 1119206400. Its totient is φ = 347820480.

The previous prime is 664005019. The next prime is 664005037. The reversal of 664005027 is 720500466.

It is not a de Polignac number, because 664005027 - 2³ = 664005019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664004985 and 664005003.

It is not an unprimeable number, because it can be changed into a prime (664005037) 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 47 ways as a sum of consecutive naturals, for example, 82749 + ... + 90417.

It is an arithmetic number, because the mean of its divisors is an integer number (23316800).

Almost surely, 2^664005027 is an apocalyptic number.

664005027 is a deficient number, since it is larger than the sum of its proper divisors (455201373).

664005027 is a wasteful number, since it uses less digits than its factorization.

664005027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7736 (or 7729 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 664005027 is about 25768.2949959830. The cubic root of 664005027 is about 872.4163359048.

The spelling of 664005027 in words is "six hundred sixty-four million, five thousand, twenty-seven".