27727078866 has 32 divisors (see below), whose sum is σ = 56318377920. Its totient is φ = 9098502336.

The previous prime is 27727078859. The next prime is 27727078867. The reversal of 27727078866 is 66887072772.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (27727078867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620400 + ... + 663588.

It is an arithmetic number, because the mean of its divisors is an integer number (1759949310).

Almost surely, 2^27727078866 is an apocalyptic number.

27727078866 is an abundant number, since it is smaller than the sum of its proper divisors (28591299054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27727078866 is a wasteful number, since it uses less digits than its factorization.

27727078866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44858.

The product of its (nonzero) digits is 22127616, while the sum is 60.

The spelling of 27727078866 in words is "twenty-seven billion, seven hundred twenty-seven million, seventy-eight thousand, eight hundred sixty-six".