67728273077 has 8 divisors (see below), whose sum is σ = 68033299800. Its totient is φ = 67423682304.

The previous prime is 67728273023. The next prime is 67728273101. The reversal of 67728273077 is 77037282776.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8099716 + 67720173361 = 2846^2 + 260231^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67728273077 - 2²⁶ = 67661164213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67728273017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204449 + ... + 421017.

It is an arithmetic number, because the mean of its divisors is an integer number (8504162475).

Almost surely, 2^67728273077 is an apocalyptic number.

It is an amenable number.

67728273077 is a deficient number, since it is larger than the sum of its proper divisors (305026723).

67728273077 is a wasteful number, since it uses less digits than its factorization.

67728273077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217975.

The product of its (nonzero) digits is 9680832, while the sum is 56.

The spelling of 67728273077 in words is "sixty-seven billion, seven hundred twenty-eight million, two hundred seventy-three thousand, seventy-seven".