27696866737 has 4 divisors (see below), whose sum is σ = 27698873076. Its totient is φ = 27694860400.

The previous prime is 27696866699. The next prime is 27696866761. The reversal of 27696866737 is 73766869672.

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 16952300401 + 10744566336 = 130201^2 + 103656^2 .

It is a cyclic number.

It is not a de Polignac number, because 27696866737 - 2⁷ = 27696866609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27696866797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982318 + ... + 1010119.

It is an arithmetic number, because the mean of its divisors is an integer number (6924718269).

Almost surely, 2^27696866737 is an apocalyptic number.

It is an amenable number.

27696866737 is a deficient number, since it is larger than the sum of its proper divisors (2006339).

27696866737 is a wasteful number, since it uses less digits than its factorization.

27696866737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006338.

The product of its digits is 192036096, while the sum is 67.

The spelling of 27696866737 in words is "twenty-seven billion, six hundred ninety-six million, eight hundred sixty-six thousand, seven hundred thirty-seven".