68660806273 has 4 divisors (see below), whose sum is σ = 68662725460. Its totient is φ = 68658887088.

The previous prime is 68660806259. The next prime is 68660806297. The reversal of 68660806273 is 37260806686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23442059664 + 45218746609 = 153108^2 + 212647^2 .

It is a cyclic number.

It is not a de Polignac number, because 68660806273 - 2⁵ = 68660806241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68660806273.

It is not an unprimeable number, because it can be changed into a prime (68660806213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904890 + ... + 977827.

It is an arithmetic number, because the mean of its divisors is an integer number (17165681365).

Almost surely, 2^68660806273 is an apocalyptic number.

It is an amenable number.

68660806273 is a deficient number, since it is larger than the sum of its proper divisors (1919187).

68660806273 is a wasteful number, since it uses less digits than its factorization.

68660806273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919186.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 68660806273 in words is "sixty-eight billion, six hundred sixty million, eight hundred six thousand, two hundred seventy-three".