664663013 has 16 divisors (see below), whose sum is σ = 779466240. Its totient is φ = 554870400.

The previous prime is 664663007. The next prime is 664663019. The reversal of 664663013 is 310366466.

It is an interprime number because it is at equal distance from previous prime (664663007) and next prime (664663019).

It is not a de Polignac number, because 664663013 - 2¹⁰ = 664661989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664663019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204743 + ... + 207963.

It is an arithmetic number, because the mean of its divisors is an integer number (48716640).

Almost surely, 2^664663013 is an apocalyptic number.

It is an amenable number.

664663013 is a deficient number, since it is larger than the sum of its proper divisors (114803227).

664663013 is a wasteful number, since it uses less digits than its factorization.

664663013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 664663013 is about 25781.0591908091. The cubic root of 664663013 is about 872.7044101436.

The spelling of 664663013 in words is "six hundred sixty-four million, six hundred sixty-three thousand, thirteen".