16668718522 has 32 divisors (see below), whose sum is σ = 26030938752. Its totient is φ = 7998243264.

The previous prime is 16668718511. The next prime is 16668718529. The reversal of 16668718522 is 22581786661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 16668718522.

It is not an unprimeable number, because it can be changed into a prime (16668718529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4463368 + ... + 4467100.

It is an arithmetic number, because the mean of its divisors is an integer number (813466836).

Almost surely, 2^16668718522 is an apocalyptic number.

16668718522 is a deficient number, since it is larger than the sum of its proper divisors (9362220230).

16668718522 is a wasteful number, since it uses less digits than its factorization.

16668718522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4582.

The product of its digits is 1935360, while the sum is 52.

The spelling of 16668718522 in words is "sixteen billion, six hundred sixty-eight million, seven hundred eighteen thousand, five hundred twenty-two".