16661240343 has 24 divisors (see below), whose sum is σ = 26645938176. Its totient is φ = 9947005200.

The previous prime is 16661240333. The next prime is 16661240369. The reversal of 16661240343 is 34304216661.

16661240343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16661240343 - 2⁶ = 16661240279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16661240298 and 16661240307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661240333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1249303 + ... + 1262568.

It is an arithmetic number, because the mean of its divisors is an integer number (1110247424).

Almost surely, 2^16661240343 is an apocalyptic number.

16661240343 is a deficient number, since it is larger than the sum of its proper divisors (9984697833).

16661240343 is a wasteful number, since it uses less digits than its factorization.

16661240343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511955 (or 2511952 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 16661240343 in words is "sixteen billion, six hundred sixty-one million, two hundred forty thousand, three hundred forty-three".