27777660660 has 72 divisors (see below), whose sum is σ = 88693594080. Its totient is φ = 7017513408.

The previous prime is 27777660653. The next prime is 27777660661. The reversal of 27777660660 is 6606677772.

27777660660 is a `hidden beast` number, since 27 + 7 + 7 + 7 + 6 + 606 + 6 + 0 = 666.

It is a super-2 number, since 2×27777660660² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27777660597 and 27777660606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27777660661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4057642 + ... + 4064481.

Almost surely, 2^27777660660 is an apocalyptic number.

27777660660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27777660660 is an abundant number, since it is smaller than the sum of its proper divisors (60915933420).

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

27777660660 is a wasteful number, since it uses less digits than its factorization.

27777660660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8122157 (or 8122152 counting only the distinct ones).

The product of its (nonzero) digits is 6223392, while the sum is 54.

The spelling of 27777660660 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred sixty thousand, six hundred sixty".