27780836667 has 8 divisors (see below), whose sum is σ = 37902537024. Its totient is φ = 18089847048.

The previous prime is 27780836653. The next prime is 27780836669. The reversal of 27780836667 is 76663808772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27780836667 - 2¹¹ = 27780834619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27780836667.

It is not an unprimeable number, because it can be changed into a prime (27780836669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107677533 + ... + 107677790.

It is an arithmetic number, because the mean of its divisors is an integer number (4737817128).

Almost surely, 2^27780836667 is an apocalyptic number.

27780836667 is a deficient number, since it is larger than the sum of its proper divisors (10121700357).

27780836667 is a wasteful number, since it uses less digits than its factorization.

27780836667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215355369.

The product of its (nonzero) digits is 28449792, while the sum is 60.

The spelling of 27780836667 in words is "twenty-seven billion, seven hundred eighty million, eight hundred thirty-six thousand, six hundred sixty-seven".