27666220016 has 20 divisors (see below), whose sum is σ = 54249126792. Its totient is φ = 13666445376.

The previous prime is 27666220009. The next prime is 27666220061. The reversal of 27666220016 is 61002266672.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10415171 + ... + 10417826.

Almost surely, 2^27666220016 is an apocalyptic number.

It is an amenable number.

27666220016 is a deficient number, since it is larger than the sum of its proper divisors (26582906776).

27666220016 is a wasteful number, since it uses less digits than its factorization.

27666220016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20833088 (or 20833082 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

Adding to 27666220016 its reverse (61002266672), we get a palindrome (88668486688).

The spelling of 27666220016 in words is "twenty-seven billion, six hundred sixty-six million, two hundred twenty thousand, sixteen".