27665706868 has 12 divisors (see below), whose sum is σ = 50084469540. Its totient is φ = 13355858432.

The previous prime is 27665706821. The next prime is 27665706889. The reversal of 27665706868 is 86860756672.

It can be written as a sum of positive squares in 2 ways, for example, as 6079632784 + 21586074084 = 77972^2 + 146922^2 .

It is a super-2 number, since 2×27665706868² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119248621 + ... + 119248852.

It is an arithmetic number, because the mean of its divisors is an integer number (4173705795).

Almost surely, 2^27665706868 is an apocalyptic number.

It is an amenable number.

27665706868 is a deficient number, since it is larger than the sum of its proper divisors (22418762672).

27665706868 is a wasteful number, since it uses less digits than its factorization.

27665706868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238497506 (or 238497504 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 61.

The spelling of 27665706868 in words is "twenty-seven billion, six hundred sixty-five million, seven hundred six thousand, eight hundred sixty-eight".