663965013 has 8 divisors (see below), whose sum is σ = 931880800. Its totient is φ = 419346288.

The previous prime is 663964999. The next prime is 663965047. The reversal of 663965013 is 310569366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 663965013 - 2⁴ = 663964997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663965083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5824198 + ... + 5824311.

It is an arithmetic number, because the mean of its divisors is an integer number (116485100).

Almost surely, 2^663965013 is an apocalyptic number.

It is an amenable number.

663965013 is a deficient number, since it is larger than the sum of its proper divisors (267915787).

663965013 is a wasteful number, since it uses less digits than its factorization.

663965013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11648531.

The product of its (nonzero) digits is 87480, while the sum is 39.

The square root of 663965013 is about 25767.5185650462. The cubic root of 663965013 is about 872.3988111537.

The spelling of 663965013 in words is "six hundred sixty-three million, nine hundred sixty-five thousand, thirteen".