663664614 has 16 divisors (see below), whose sum is σ = 1347140928. Its totient is φ = 217919592.

The previous prime is 663664613. The next prime is 663664621. The reversal of 663664614 is 416466366.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663664613) 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 7 ways as a sum of consecutive naturals, for example, 825052 + ... + 825855.

It is an arithmetic number, because the mean of its divisors is an integer number (84196308).

Almost surely, 2^663664614 is an apocalyptic number.

663664614 is an abundant number, since it is smaller than the sum of its proper divisors (683476314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663664614 is a wasteful number, since it uses less digits than its factorization.

663664614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650979.

The product of its digits is 373248, while the sum is 42.

The square root of 663664614 is about 25761.6888809721. The cubic root of 663664614 is about 872.2672242689.

The spelling of 663664614 in words is "six hundred sixty-three million, six hundred sixty-four thousand, six hundred fourteen".