668280361738 has 32 divisors (see below), whose sum is σ = 1186117043328. Its totient is φ = 278922278400.

The previous prime is 668280361729. The next prime is 668280361757. The reversal of 668280361738 is 837163082866.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21775470 + ... + 21806137.

It is an arithmetic number, because the mean of its divisors is an integer number (37066157604).

Almost surely, 2^668280361738 is an apocalyptic number.

668280361738 is a deficient number, since it is larger than the sum of its proper divisors (517836681590).

668280361738 is a wasteful number, since it uses less digits than its factorization.

668280361738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43581678.

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 668280361738 in words is "six hundred sixty-eight billion, two hundred eighty million, three hundred sixty-one thousand, seven hundred thirty-eight".