16666870193 has 8 divisors (see below), whose sum is σ = 17651895912. Its totient is φ = 15682358016.

The previous prime is 16666870183. The next prime is 16666870211. The reversal of 16666870193 is 39107866661.

It can be written as a sum of positive squares in 4 ways, for example, as 2763394624 + 13903475569 = 52568^2 + 117913^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16666870193 - 2⁴ = 16666870177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16666870183) 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, 60530 + ... + 192347.

It is an arithmetic number, because the mean of its divisors is an integer number (2206486989).

Almost surely, 2^16666870193 is an apocalyptic number.

It is an amenable number.

16666870193 is a deficient number, since it is larger than the sum of its proper divisors (985025719).

16666870193 is a wasteful number, since it uses less digits than its factorization.

16666870193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256771.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 16666870193 in words is "sixteen billion, six hundred sixty-six million, eight hundred seventy thousand, one hundred ninety-three".