664947059 has 4 divisors (see below), whose sum is σ = 759939504. Its totient is φ = 569954616.

The previous prime is 664947053. The next prime is 664947067. The reversal of 664947059 is 950749466.

664947059 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 664947059 - 2⁸ = 664946803 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664946998 and 664947016.

It is not an unprimeable number, because it can be changed into a prime (664947053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47496212 + ... + 47496225.

It is an arithmetic number, because the mean of its divisors is an integer number (189984876).

Almost surely, 2^664947059 is an apocalyptic number.

664947059 is a deficient number, since it is larger than the sum of its proper divisors (94992445).

664947059 is an equidigital number, since it uses as much as digits as its factorization.

664947059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94992444.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The square root of 664947059 is about 25786.5674140627. The cubic root of 664947059 is about 872.8287101716.

The spelling of 664947059 in words is "six hundred sixty-four million, nine hundred forty-seven thousand, fifty-nine".