166870871 has 8 divisors (see below), whose sum is σ = 170694864. Its totient is φ = 163072000.

The previous prime is 166870867. The next prime is 166870877. The reversal of 166870871 is 178078661.

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 166870871 - 2² = 166870867 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 (166870877) 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, 7496 + ... + 19746.

It is an arithmetic number, because the mean of its divisors is an integer number (21336858).

Almost surely, 2^166870871 is an apocalyptic number.

166870871 is a deficient number, since it is larger than the sum of its proper divisors (3823993).

166870871 is a wasteful number, since it uses less digits than its factorization.

166870871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12561.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 166870871 is about 12917.8508661464. The cubic root of 166870871 is about 550.5458723701.

The spelling of 166870871 in words is "one hundred sixty-six million, eight hundred seventy thousand, eight hundred seventy-one".