27399066773 has 4 divisors (see below), whose sum is σ = 29506687308. Its totient is φ = 25291446240.

The previous prime is 27399066763. The next prime is 27399066781. The reversal of 27399066773 is 37766099372.

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 2980941604 + 24418125169 = 54598^2 + 156263^2 .

It is a cyclic number.

It is not a de Polignac number, because 27399066773 - 2⁸ = 27399066517 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 (27399066763) 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, 1053810248 + ... + 1053810273.

It is an arithmetic number, because the mean of its divisors is an integer number (7376671827).

Almost surely, 2^27399066773 is an apocalyptic number.

It is an amenable number.

27399066773 is a deficient number, since it is larger than the sum of its proper divisors (2107620535).

27399066773 is a wasteful number, since it uses less digits than its factorization.

27399066773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107620534.

The product of its (nonzero) digits is 18003384, while the sum is 59.

The spelling of 27399066773 in words is "twenty-seven billion, three hundred ninety-nine million, sixty-six thousand, seven hundred seventy-three".