664004345 has 16 divisors (see below), whose sum is σ = 828057600. Its totient is φ = 510600000.

The previous prime is 664004333. The next prime is 664004351. The reversal of 664004345 is 543400466.

It is not a de Polignac number, because 664004345 - 2⁶ = 664004281 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8720 + ... + 37470.

It is an arithmetic number, because the mean of its divisors is an integer number (51753600).

Almost surely, 2^664004345 is an apocalyptic number.

It is an amenable number.

664004345 is a deficient number, since it is larger than the sum of its proper divisors (164053255).

664004345 is a wasteful number, since it uses less digits than its factorization.

664004345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28936.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 664004345 is about 25768.2817626632. The cubic root of 664004345 is about 872.4160372182.

The spelling of 664004345 in words is "six hundred sixty-four million, four thousand, three hundred forty-five".