16660261233543 has 32 divisors (see below), whose sum is σ = 24758862969600. Its totient is φ = 9903081171456.

The previous prime is 16660261233527. The next prime is 16660261233547. The reversal of 16660261233543 is 34533216206661.

It is not a de Polignac number, because 16660261233543 - 2⁴ = 16660261233527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16660261233492 and 16660261233501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660261233547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46851348 + ... + 47205606.

It is an arithmetic number, because the mean of its divisors is an integer number (773714467800).

Almost surely, 2^{16660261233543} is an apocalyptic number.

16660261233543 is a deficient number, since it is larger than the sum of its proper divisors (8098601736057).

16660261233543 is a wasteful number, since it uses less digits than its factorization.

16660261233543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402831.

The product of its (nonzero) digits is 2799360, while the sum is 48.

The spelling of 16660261233543 in words is "sixteen trillion, six hundred sixty billion, two hundred sixty-one million, two hundred thirty-three thousand, five hundred forty-three".