668851803 has 8 divisors (see below), whose sum is σ = 990891600. Its totient is φ = 445901184.

The previous prime is 668851793. The next prime is 668851873. The reversal of 668851803 is 308158866.

It is not a de Polignac number, because 668851803 - 2⁴ = 668851787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668851873) 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, 12386118 + ... + 12386171.

It is an arithmetic number, because the mean of its divisors is an integer number (123861450).

Almost surely, 2^668851803 is an apocalyptic number.

668851803 is a deficient number, since it is larger than the sum of its proper divisors (322039797).

668851803 is a wasteful number, since it uses less digits than its factorization.

668851803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24772298 (or 24772292 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 668851803 is about 25862.1693405638. The cubic root of 668851803 is about 874.5338700403.

The spelling of 668851803 in words is "six hundred sixty-eight million, eight hundred fifty-one thousand, eight hundred three".