664043475 has 24 divisors (see below), whose sum is σ = 1113357312. Its totient is φ = 349165600.

The previous prime is 664043459. The next prime is 664043531. The reversal of 664043475 is 574340466.

It is a happy number.

664043475 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664043475 - 2⁴ = 664043459 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 23 ways as a sum of consecutive naturals, for example, 57027 + ... + 67676.

It is an arithmetic number, because the mean of its divisors is an integer number (46389888).

Almost surely, 2^664043475 is an apocalyptic number.

664043475 is a deficient number, since it is larger than the sum of its proper divisors (449313837).

664043475 is a wasteful number, since it uses less digits than its factorization.

664043475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124787 (or 124782 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 39.

The square root of 664043475 is about 25769.0410182451. The cubic root of 664043475 is about 872.4331741387.

The spelling of 664043475 in words is "six hundred sixty-four million, forty-three thousand, four hundred seventy-five".