16343661663 has 12 divisors (see below), whose sum is σ = 26980013008. Its totient is φ = 9339235200.

The previous prime is 16343661643. The next prime is 16343661667. The reversal of 16343661663 is 36616634361.

16343661663 is a `hidden beast` number, since 1 + 634 + 3 + 6 + 6 + 1 + 6 + 6 + 3 = 666.

It is not a de Polignac number, because 16343661663 - 2⁶ = 16343661599 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 (16343661667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129711538 + ... + 129711663.

Almost surely, 2^16343661663 is an apocalyptic number.

16343661663 is a deficient number, since it is larger than the sum of its proper divisors (10636351345).

16343661663 is a wasteful number, since it uses less digits than its factorization.

16343661663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259423214 (or 259423211 counting only the distinct ones).

The product of its digits is 839808, while the sum is 45.

The spelling of 16343661663 in words is "sixteen billion, three hundred forty-three million, six hundred sixty-one thousand, six hundred sixty-three".