27764456660 has 12 divisors (see below), whose sum is σ = 58305359028. Its totient is φ = 11105782656.

The previous prime is 27764456659. The next prime is 27764456689. The reversal of 27764456660 is 6665446772.

It can be written as a sum of positive squares in 2 ways, for example, as 21361576336 + 6402880324 = 146156^2 + 80018^2 .

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, 694111397 + ... + 694111436.

It is an arithmetic number, because the mean of its divisors is an integer number (4858779919).

Almost surely, 2^27764456660 is an apocalyptic number.

27764456660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27764456660 is an abundant number, since it is smaller than the sum of its proper divisors (30540902368).

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

27764456660 is a wasteful number, since it uses less digits than its factorization.

27764456660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388222842 (or 1388222840 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 53.

The spelling of 27764456660 in words is "twenty-seven billion, seven hundred sixty-four million, four hundred fifty-six thousand, six hundred sixty".