166651161 has 8 divisors (see below), whose sum is σ = 222398880. Its totient is φ = 111002112.

The previous prime is 166651103. The next prime is 166651193. The reversal of 166651161 is 161156661.

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

It is not a de Polignac number, because 166651161 - 2¹⁵ = 166618393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166651861) 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, 20631 + ... + 27548.

It is an arithmetic number, because the mean of its divisors is an integer number (27799860).

Almost surely, 2^166651161 is an apocalyptic number.

It is an amenable number.

166651161 is a deficient number, since it is larger than the sum of its proper divisors (55747719).

166651161 is a wasteful number, since it uses less digits than its factorization.

166651161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49335.

The product of its digits is 6480, while the sum is 33.

The square root of 166651161 is about 12909.3439415022. The cubic root of 166651161 is about 550.3041414254.

The spelling of 166651161 in words is "one hundred sixty-six million, six hundred fifty-one thousand, one hundred sixty-one".