166683643333 has 4 divisors (see below), whose sum is σ = 168212851180. Its totient is φ = 165154435488.

The previous prime is 166683643283. The next prime is 166683643363. The reversal of 166683643333 is 333346386661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 147718772964 + 18964870369 = 384342^2 + 137713^2 .

It is a cyclic number.

It is not a de Polignac number, because 166683643333 - 2³³ = 158093708741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166683643363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764603760 + ... + 764603977.

It is an arithmetic number, because the mean of its divisors is an integer number (42053212795).

Almost surely, 2^166683643333 is an apocalyptic number.

It is an amenable number.

166683643333 is a deficient number, since it is larger than the sum of its proper divisors (1529207847).

166683643333 is a wasteful number, since it uses less digits than its factorization.

166683643333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529207846.

The product of its digits is 10077696, while the sum is 52.

The spelling of 166683643333 in words is "one hundred sixty-six billion, six hundred eighty-three million, six hundred forty-three thousand, three hundred thirty-three".