166863864 has 64 divisors (see below), whose sum is σ = 425255040. Its totient is φ = 54552960.

The previous prime is 166863847. The next prime is 166863869. The reversal of 166863864 is 468368661.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166863869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420114 + ... + 420510.

It is an arithmetic number, because the mean of its divisors is an integer number (6644610).

Almost surely, 2^166863864 is an apocalyptic number.

It is an amenable number.

166863864 is an abundant number, since it is smaller than the sum of its proper divisors (258391176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166863864 is a wasteful number, since it uses less digits than its factorization.

166863864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 696 counting only the distinct ones).

The product of its digits is 995328, while the sum is 48.

The square root of 166863864 is about 12917.5796494545. The cubic root of 166863864 is about 550.5381663539.

The spelling of 166863864 in words is "one hundred sixty-six million, eight hundred sixty-three thousand, eight hundred sixty-four".