664002625 has 64 divisors (see below), whose sum is σ = 984791808. Its totient is φ = 444312000.

The previous prime is 664002623. The next prime is 664002637. The reversal of 664002625 is 526200466.

It is not a de Polignac number, because 664002625 - 2¹ = 664002623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664002623) 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 63 ways as a sum of consecutive naturals, for example, 2162722 + ... + 2163028.

It is an arithmetic number, because the mean of its divisors is an integer number (15387372).

Almost surely, 2^664002625 is an apocalyptic number.

664002625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

664002625 is a deficient number, since it is larger than the sum of its proper divisors (320789183).

664002625 is a wasteful number, since it uses less digits than its factorization.

664002625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 664002625 is about 25768.2483882782. The cubic root of 664002625 is about 872.4152839316.

The spelling of 664002625 in words is "six hundred sixty-four million, two thousand, six hundred twenty-five".