668803705 has 16 divisors (see below), whose sum is σ = 847396800. Its totient is φ = 505327680.

The previous prime is 668803699. The next prime is 668803727. The reversal of 668803705 is 507308866.

It is not a de Polignac number, because 668803705 - 2³ = 668803697 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20811 + ... + 42079.

It is an arithmetic number, because the mean of its divisors is an integer number (52962300).

Almost surely, 2^668803705 is an apocalyptic number.

It is an amenable number.

668803705 is a deficient number, since it is larger than the sum of its proper divisors (178593095).

668803705 is a wasteful number, since it uses less digits than its factorization.

668803705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21624.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 668803705 is about 25861.2394327882. The cubic root of 668803705 is about 874.5129065831.

The spelling of 668803705 in words is "six hundred sixty-eight million, eight hundred three thousand, seven hundred five".