166850168721 has 8 divisors (see below), whose sum is σ = 223831719840. Its totient is φ = 110551031712.

The previous prime is 166850168711. The next prime is 166850168729. The reversal of 166850168721 is 127861058661.

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

It is not a de Polignac number, because 166850168721 - 2⁵ = 166850168689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166850168729) 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, 170602956 + ... + 170603933.

It is an arithmetic number, because the mean of its divisors is an integer number (27978964980).

Almost surely, 2^166850168721 is an apocalyptic number.

It is an amenable number.

166850168721 is a deficient number, since it is larger than the sum of its proper divisors (56981551119).

166850168721 is a wasteful number, since it uses less digits than its factorization.

166850168721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341207055.

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 166850168721 in words is "one hundred sixty-six billion, eight hundred fifty million, one hundred sixty-eight thousand, seven hundred twenty-one".