27667640417 has 4 divisors (see below), whose sum is σ = 27670172820. Its totient is φ = 27665108016.

The previous prime is 27667640389. The next prime is 27667640423. The reversal of 27667640417 is 71404676672.

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 21572559376 + 6095081041 = 146876^2 + 78071^2 .

It is a cyclic number.

It is not a de Polignac number, because 27667640417 - 2¹⁶ = 27667574881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27667640477) 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, 1249742 + ... + 1271687.

It is an arithmetic number, because the mean of its divisors is an integer number (6917543205).

Almost surely, 2^27667640417 is an apocalyptic number.

It is an amenable number.

27667640417 is a deficient number, since it is larger than the sum of its proper divisors (2532403).

27667640417 is a wasteful number, since it uses less digits than its factorization.

27667640417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532402.

The product of its (nonzero) digits is 2370816, while the sum is 50.

The spelling of 27667640417 in words is "twenty-seven billion, six hundred sixty-seven million, six hundred forty thousand, four hundred seventeen".