2756775665 has 16 divisors (see below), whose sum is σ = 3810496512. Its totient is φ = 1875472704.

The previous prime is 2756775643. The next prime is 2756775673. The reversal of 2756775665 is 5665776572.

It is not a de Polignac number, because 2756775665 - 2²⁰ = 2755727089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2756775665.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305654 + ... + 314543.

It is an arithmetic number, because the mean of its divisors is an integer number (238156032).

Almost surely, 2^2756775665 is an apocalyptic number.

It is an amenable number.

2756775665 is a deficient number, since it is larger than the sum of its proper divisors (1053720847).

2756775665 is a wasteful number, since it uses less digits than its factorization.

2756775665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620336.

The product of its digits is 18522000, while the sum is 56.

The square root of 2756775665 is about 52505.0060946573. The cubic root of 2756775665 is about 1402.1693688628.

The spelling of 2756775665 in words is "two billion, seven hundred fifty-six million, seven hundred seventy-five thousand, six hundred sixty-five".