668051256855 has 16 divisors (see below), whose sum is σ = 1069706160864. Its totient is φ = 356019287040.

The previous prime is 668051256853. The next prime is 668051256871. The reversal of 668051256855 is 558652150866.

It is not a de Polignac number, because 668051256855 - 2¹ = 668051256853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668051256795 and 668051256804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668051256853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17149686 + ... + 17188595.

It is an arithmetic number, because the mean of its divisors is an integer number (66856635054).

Almost surely, 2^668051256855 is an apocalyptic number.

668051256855 is a deficient number, since it is larger than the sum of its proper divisors (401654904009).

668051256855 is a wasteful number, since it uses less digits than its factorization.

668051256855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34339586.

The product of its (nonzero) digits is 17280000, while the sum is 57.

The spelling of 668051256855 in words is "six hundred sixty-eight billion, fifty-one million, two hundred fifty-six thousand, eight hundred fifty-five".