27777660745 has 8 divisors (see below), whose sum is σ = 33338983680. Its totient is φ = 22218268080.

The previous prime is 27777660737. The next prime is 27777660787. The reversal of 27777660745 is 54706677772.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27777660745 - 2³ = 27777660737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27777660745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450715 + ... + 508624.

It is an arithmetic number, because the mean of its divisors is an integer number (4167372960).

Almost surely, 2^27777660745 is an apocalyptic number.

It is an amenable number.

27777660745 is a deficient number, since it is larger than the sum of its proper divisors (5561322935).

27777660745 is an equidigital number, since it uses as much as digits as its factorization.

27777660745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965135.

The product of its (nonzero) digits is 24202080, while the sum is 58.

The spelling of 27777660745 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred sixty thousand, seven hundred forty-five".