166863856 has 10 divisors (see below), whose sum is σ = 323298752. Its totient is φ = 83431920.

The previous prime is 166863847. The next prime is 166863869. The reversal of 166863856 is 658368661.

166863856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5214480 + ... + 5214511.

Almost surely, 2^166863856 is an apocalyptic number.

166863856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166863856 is a deficient number, since it is larger than the sum of its proper divisors (156434896).

166863856 is a wasteful number, since it uses less digits than its factorization.

166863856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10428999 (or 10428993 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 166863856 is about 12917.5793397989. The cubic root of 166863856 is about 550.5381575557.

The spelling of 166863856 in words is "one hundred sixty-six million, eight hundred sixty-three thousand, eight hundred fifty-six".