16661172510120 has 32 divisors (see below), whose sum is σ = 49983517530720. Its totient is φ = 4442979336000.

The previous prime is 16661172510109. The next prime is 16661172510163. The reversal of 16661172510120 is 2101527116661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69421552006 + ... + 69421552245.

It is an arithmetic number, because the mean of its divisors is an integer number (1561984922835).

Almost surely, 2^{16661172510120} is an apocalyptic number.

16661172510120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16661172510120 is an abundant number, since it is smaller than the sum of its proper divisors (33322345020600).

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

16661172510120 is a wasteful number, since it uses less digits than its factorization.

16661172510120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138843104265 (or 138843104261 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 39.

Adding to 16661172510120 its reverse (2101527116661), we get a palindrome (18762699626781).

The spelling of 16661172510120 in words is "sixteen trillion, six hundred sixty-one billion, one hundred seventy-two million, five hundred ten thousand, one hundred twenty".