16661056640115 has 16 divisors (see below), whose sum is σ = 26658270477216. Its totient is φ = 8885703590400.

The previous prime is 16661056640099. The next prime is 16661056640141. The reversal of 16661056640115 is 51104665016661.

It is not a de Polignac number, because 16661056640115 - 2⁴ = 16661056640099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11366326 + ... + 12748155.

It is an arithmetic number, because the mean of its divisors is an integer number (1666141904826).

Almost surely, 2^{16661056640115} is an apocalyptic number.

16661056640115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16661056640115 is a deficient number, since it is larger than the sum of its proper divisors (9997213837101).

16661056640115 is a wasteful number, since it uses less digits than its factorization.

16661056640115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24160550.

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 16661056640115 in words is "sixteen trillion, six hundred sixty-one billion, fifty-six million, six hundred forty thousand, one hundred fifteen".