668550003 has 32 divisors (see below), whose sum is σ = 1017660672. Its totient is φ = 386755200.

The previous prime is 668549989. The next prime is 668550011. The reversal of 668550003 is 300055866.

It is not a de Polignac number, because 668550003 - 2¹⁸ = 668287859 is a prime.

It is a super-2 number, since 2×668550003² = 893918213022600018, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (668550203) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 59548 + ... + 69878.

It is an arithmetic number, because the mean of its divisors is an integer number (31801896).

Almost surely, 2^668550003 is an apocalyptic number.

668550003 is a deficient number, since it is larger than the sum of its proper divisors (349110669).

668550003 is a wasteful number, since it uses less digits than its factorization.

668550003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10435.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 668550003 is about 25856.3339048675. Note that the first 3 decimals coincide. The cubic root of 668550003 is about 874.4023142266.

The spelling of 668550003 in words is "six hundred sixty-eight million, five hundred fifty thousand, three".