166873613187 has 8 divisors (see below), whose sum is σ = 222541349904. Its totient is φ = 111227475968.

The previous prime is 166873613177. The next prime is 166873613189. The reversal of 166873613187 is 781316378661.

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

It is a cyclic number.

It is not a de Polignac number, because 166873613187 - 2⁴ = 166873613171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166873613189) 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, 5381838 + ... + 5412755.

It is an arithmetic number, because the mean of its divisors is an integer number (27817668738).

Almost surely, 2^166873613187 is an apocalyptic number.

166873613187 is a deficient number, since it is larger than the sum of its proper divisors (55667736717).

166873613187 is a wasteful number, since it uses less digits than its factorization.

166873613187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10799749.

The product of its digits is 6096384, while the sum is 57.

The spelling of 166873613187 in words is "one hundred sixty-six billion, eight hundred seventy-three million, six hundred thirteen thousand, one hundred eighty-seven".