27696866738 has 4 divisors (see below), whose sum is σ = 41545300110. Its totient is φ = 13848433368.

The previous prime is 27696866699. The next prime is 27696866761. The reversal of 27696866738 is 83766869672.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 16777243729 + 10919623009 = 129527^2 + 104497^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6924216683 + ... + 6924216686.

Almost surely, 2^27696866738 is an apocalyptic number.

27696866738 is a deficient number, since it is larger than the sum of its proper divisors (13848433372).

27696866738 is a wasteful number, since it uses less digits than its factorization.

27696866738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13848433371.

The product of its digits is 219469824, while the sum is 68.

The spelling of 27696866738 in words is "twenty-seven billion, six hundred ninety-six million, eight hundred sixty-six thousand, seven hundred thirty-eight".