664530093 has 12 divisors (see below), whose sum is σ = 960121500. Its totient is φ = 442907136.

The previous prime is 664530089. The next prime is 664530103. The reversal of 664530093 is 390035466.

664530093 is a `hidden beast` number, since 6 + 645 + 3 + 0 + 0 + 9 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 87665769 + 576864324 = 9363^2 + 24018^2 .

It is not a de Polignac number, because 664530093 - 2² = 664530089 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664530193) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 43533 + ... + 56781.

It is an arithmetic number, because the mean of its divisors is an integer number (80010125).

Almost surely, 2^664530093 is an apocalyptic number.

It is an amenable number.

664530093 is a deficient number, since it is larger than the sum of its proper divisors (295591407).

664530093 is a wasteful number, since it uses less digits than its factorization.

664530093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18828 (or 18825 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 664530093 is about 25778.4812004121. The cubic root of 664530093 is about 872.6462314870.

The spelling of 664530093 in words is "six hundred sixty-four million, five hundred thirty thousand, ninety-three".