668266051873 has 16 divisors (see below), whose sum is σ = 804535121920. Its totient is φ = 542243057616.

The previous prime is 668266051867. The next prime is 668266051879. The reversal of 668266051873 is 378150662866.

668266051873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (668266051867) and next prime (668266051879).

It is a cyclic number.

It is not a de Polignac number, because 668266051873 - 2⁹ = 668266051361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668266051879) 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, 1716711 + ... + 2069692.

It is an arithmetic number, because the mean of its divisors is an integer number (50283445120).

Almost surely, 2^668266051873 is an apocalyptic number.

It is an amenable number.

668266051873 is a deficient number, since it is larger than the sum of its proper divisors (136269070047).

668266051873 is a wasteful number, since it uses less digits than its factorization.

668266051873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3787756.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 668266051873 in words is "six hundred sixty-eight billion, two hundred sixty-six million, fifty-one thousand, eight hundred seventy-three".