668311364427 has 32 divisors (see below), whose sum is σ = 1070766228480. Its totient is φ = 362678843520.

The previous prime is 668311364419. The next prime is 668311364437. The reversal of 668311364427 is 724463113866.

It is not a de Polignac number, because 668311364427 - 2³ = 668311364419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 668311364427.

It is not an unprimeable number, because it can be changed into a prime (668311364407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8957863 + ... + 9032160.

It is an arithmetic number, because the mean of its divisors is an integer number (33461444640).

Almost surely, 2^668311364427 is an apocalyptic number.

668311364427 is a deficient number, since it is larger than the sum of its proper divisors (402454864053).

668311364427 is a wasteful number, since it uses less digits than its factorization.

668311364427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17990123.

The product of its digits is 3483648, while the sum is 51.

The spelling of 668311364427 in words is "six hundred sixty-eight billion, three hundred eleven million, three hundred sixty-four thousand, four hundred twenty-seven".