16721157166 has 16 divisors (see below), whose sum is σ = 28672980480. Its totient is φ = 7164175320.

The previous prime is 16721157161. The next prime is 16721157169. The reversal of 16721157166 is 66175112761.

It is a happy number.

16721157166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16721157161) 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 7 ways as a sum of consecutive naturals, for example, 117970 + ... + 217621.

It is an arithmetic number, because the mean of its divisors is an integer number (1792061280).

Almost surely, 2^16721157166 is an apocalyptic number.

16721157166 is a deficient number, since it is larger than the sum of its proper divisors (11951823314).

16721157166 is a wasteful number, since it uses less digits than its factorization.

16721157166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339159.

The product of its digits is 105840, while the sum is 43.

The spelling of 16721157166 in words is "sixteen billion, seven hundred twenty-one million, one hundred fifty-seven thousand, one hundred sixty-six".