663341506623 has 16 divisors (see below), whose sum is σ = 982754229600. Its totient is φ = 442215938880.

The previous prime is 663341506603. The next prime is 663341506649. The reversal of 663341506623 is 326605143366.

663341506623 is a `hidden beast` number, since 6 + 6 + 3 + 3 + 4 + 15 + 0 + 6 + 623 = 666.

It is not a de Polignac number, because 663341506623 - 2³⁰ = 662267764799 is a prime.

It is a super-3 number, since 3×663341506623³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663341506603) 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 15 ways as a sum of consecutive naturals, for example, 778753 + ... + 1390373.

It is an arithmetic number, because the mean of its divisors is an integer number (61422139350).

Almost surely, 2^663341506623 is an apocalyptic number.

663341506623 is a deficient number, since it is larger than the sum of its proper divisors (319412722977).

663341506623 is a wasteful number, since it uses less digits than its factorization.

663341506623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651799 (or 651793 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 45.

Adding to 663341506623 its reverse (326605143366), we get a palindrome (989946649989).

The spelling of 663341506623 in words is "six hundred sixty-three billion, three hundred forty-one million, five hundred six thousand, six hundred twenty-three".