668051256854 has 32 divisors (see below), whose sum is σ = 1080994572000. Its totient is φ = 308598716160.

The previous prime is 668051256853. The next prime is 668051256871. The reversal of 668051256854 is 458652150866.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 668051256854.

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, 3708872 + ... + 3884820.

It is an arithmetic number, because the mean of its divisors is an integer number (33781080375).

Almost surely, 2^668051256854 is an apocalyptic number.

668051256854 is a deficient number, since it is larger than the sum of its proper divisors (412943315146).

668051256854 is a wasteful number, since it uses less digits than its factorization.

668051256854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178448.

The product of its (nonzero) digits is 13824000, while the sum is 56.

The spelling of 668051256854 in words is "six hundred sixty-eight billion, fifty-one million, two hundred fifty-six thousand, eight hundred fifty-four".