668122338056 has 32 divisors (see below), whose sum is σ = 1316507586240. Its totient is φ = 317473587648.

The previous prime is 668122338053. The next prime is 668122338197. The reversal of 668122338056 is 650833221866.

It is a junction number, because it is equal to n+sod(n) for n = 668122337995 and 668122338013.

It is not an unprimeable number, because it can be changed into a prime (668122338053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26233436 + ... + 26258891.

It is an arithmetic number, because the mean of its divisors is an integer number (41140862070).

Almost surely, 2^668122338056 is an apocalyptic number.

It is an amenable number.

668122338056 is a deficient number, since it is larger than the sum of its proper divisors (648385248184).

668122338056 is a wasteful number, since it uses less digits than its factorization.

668122338056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52492413 (or 52492409 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 668122338056 in words is "six hundred sixty-eight billion, one hundred twenty-two million, three hundred thirty-eight thousand, fifty-six".