16663402035671 has 16 divisors (see below), whose sum is σ = 16939339038720. Its totient is φ = 16389759472800.

The previous prime is 16663402035661. The next prime is 16663402035691. The reversal of 16663402035671 is 17653020436661.

It is a cyclic number.

It is not a de Polignac number, because 16663402035671 - 2¹⁰ = 16663402034647 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 (16663402035661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27820970 + ... + 28413608.

It is an arithmetic number, because the mean of its divisors is an integer number (1058708689920).

Almost surely, 2^{16663402035671} is an apocalyptic number.

16663402035671 is a deficient number, since it is larger than the sum of its proper divisors (275937003049).

16663402035671 is a wasteful number, since it uses less digits than its factorization.

16663402035671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594574.

The product of its (nonzero) digits is 3265920, while the sum is 50.

The spelling of 16663402035671 in words is "sixteen trillion, six hundred sixty-three billion, four hundred two million, thirty-five thousand, six hundred seventy-one".