668280508307 has 4 divisors (see below), whose sum is σ = 668767239840. Its totient is φ = 667793776776.

The previous prime is 668280508237. The next prime is 668280508333. The reversal of 668280508307 is 703805082866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 668280508307 - 2¹² = 668280504211 is a prime.

It is a super-3 number, since 3×668280508307³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668280505307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243363707 + ... + 243366452.

It is an arithmetic number, because the mean of its divisors is an integer number (167191809960).

Almost surely, 2^668280508307 is an apocalyptic number.

668280508307 is a deficient number, since it is larger than the sum of its proper divisors (486731533).

668280508307 is a wasteful number, since it uses less digits than its factorization.

668280508307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486731532.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 668280508307 in words is "six hundred sixty-eight billion, two hundred eighty million, five hundred eight thousand, three hundred seven".