27656665672 has 16 divisors (see below), whose sum is σ = 51861000060. Its totient is φ = 13827065664.

The previous prime is 27656665657. The next prime is 27656665681.

27656665672 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 27640392516 + 16273156 = 166254^2 + 4034^2 .

It is a super-3 number, since 3×27656665672³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62203 + ... + 243274.

Almost surely, 2^27656665672 is an apocalyptic number.

It is an amenable number.

27656665672 is a deficient number, since it is larger than the sum of its proper divisors (24204334388).

27656665672 is a wasteful number, since it uses less digits than its factorization.

27656665672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316800 (or 316796 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 58.

The spelling of 27656665672 in words is "twenty-seven billion, six hundred fifty-six million, six hundred sixty-five thousand, six hundred seventy-two".