664556059 has 2 divisors, whose sum is σ = 664556060. Its totient is φ = 664556058.

The previous prime is 664555919. The next prime is 664556069. The reversal of 664556059 is 950655466.

It is a happy number.

664556059 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664556059 - 2⁹ = 664555547 is a prime.

It is a super-2 number, since 2×664556059² = 883269511107222962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (664556069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332278029 + 332278030.

It is an arithmetic number, because the mean of its divisors is an integer number (332278030).

Almost surely, 2^664556059 is an apocalyptic number.

664556059 is a deficient number, since it is larger than the sum of its proper divisors (1).

664556059 is an equidigital number, since it uses as much as digits as its factorization.

664556059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972000, while the sum is 46.

The square root of 664556059 is about 25778.9848326112. The cubic root of 664556059 is about 872.6575973314.

The spelling of 664556059 in words is "six hundred sixty-four million, five hundred fifty-six thousand, fifty-nine".