27666063401 has 4 divisors (see below), whose sum is σ = 27666404052. Its totient is φ = 27665722752.

The previous prime is 27666063361. The next prime is 27666063421. The reversal of 27666063401 is 10436066672.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3378399376 + 24287664025 = 58124^2 + 155845^2 .

It is a cyclic number.

It is not a de Polignac number, because 27666063401 - 2³⁴ = 10486194217 is a prime.

It is a super-2 number, since 2×27666063401² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27666063421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30161 + ... + 237153.

It is an arithmetic number, because the mean of its divisors is an integer number (6916601013).

Almost surely, 2^27666063401 is an apocalyptic number.

It is an amenable number.

27666063401 is a deficient number, since it is larger than the sum of its proper divisors (340651).

27666063401 is a wasteful number, since it uses less digits than its factorization.

27666063401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340650.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 27666063401 in words is "twenty-seven billion, six hundred sixty-six million, sixty-three thousand, four hundred one".