16663985158 has 4 divisors (see below), whose sum is σ = 24995977740. Its totient is φ = 8331992578.

The previous prime is 16663985141. The next prime is 16663985167. The reversal of 16663985158 is 85158936661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85158936661 = 82223 ⋅1035707.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4165996288 + ... + 4165996291.

It is an arithmetic number, because the mean of its divisors is an integer number (6248994435).

Almost surely, 2^16663985158 is an apocalyptic number.

16663985158 is a deficient number, since it is larger than the sum of its proper divisors (8331992582).

16663985158 is an equidigital number, since it uses as much as digits as its factorization.

16663985158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8331992581.

The product of its digits is 9331200, while the sum is 58.

The spelling of 16663985158 in words is "sixteen billion, six hundred sixty-three million, nine hundred eighty-five thousand, one hundred fifty-eight".