166671867 has 8 divisors (see below), whose sum is σ = 224306496.
Its totient is φ = 110075912.
The previous prime is 166671839. The next prime is 166671887. The reversal of 166671867 is 768176661.
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 166671867 - 28 = 166671611 is a prime.
It is a super-2 number, since 2×1666718672 = 55559022498531378, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (166671887) 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, 259293 + ... + 259934.
It is an arithmetic number, because the mean of its divisors is an integer number (28038312).
Almost surely, 2166671867 is an apocalyptic number.
166671867 is a deficient number, since it is larger than the sum of its proper divisors (57634629).
166671867 is a wasteful number, since it uses less digits than its factorization.
166671867 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 519337.
The product of its digits is 508032, while the sum is 48.
The square root of 166671867 is about 12910.1458938309.
The cubic root of 166671867 is about 550.3269317970.
The spelling of 166671867 in words is "one hundred sixty-six million, six hundred seventy-one thousand, eight hundred sixty-seven".