663432364646 has 8 divisors (see below), whose sum is σ = 995582547984. Its totient is φ = 331571515320.

The previous prime is 663432364619. The next prime is 663432364717. The reversal of 663432364646 is 646463234366.

663432364646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×663432364646² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72327770 + ... + 72336941.

It is an arithmetic number, because the mean of its divisors is an integer number (124447818498).

Almost surely, 2^663432364646 is an apocalyptic number.

663432364646 is a deficient number, since it is larger than the sum of its proper divisors (332150183338).

663432364646 is a wasteful number, since it uses less digits than its factorization.

663432364646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144667006.

The product of its digits is 26873856, while the sum is 53.

The spelling of 663432364646 in words is "six hundred sixty-three billion, four hundred thirty-two million, three hundred sixty-four thousand, six hundred forty-six".