16668518517224 has 32 divisors (see below), whose sum is σ = 35718441021120. Its totient is φ = 7143613382016.

The previous prime is 16668518517151. The next prime is 16668518517229. The reversal of 16668518517224 is 42271581586661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16668518517229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11808407 + ... + 13144409.

It is an arithmetic number, because the mean of its divisors is an integer number (1116201281910).

Almost surely, 2^{16668518517224} is an apocalyptic number.

16668518517224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16668518517224 is an abundant number, since it is smaller than the sum of its proper divisors (19049922503896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16668518517224 is a wasteful number, since it uses less digits than its factorization.

16668518517224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558809 (or 1558805 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 62.

The spelling of 16668518517224 in words is "sixteen trillion, six hundred sixty-eight billion, five hundred eighteen million, five hundred seventeen thousand, two hundred twenty-four".