2775665 has 8 divisors (see below), whose sum is σ = 3373440. Its totient is φ = 2192112.

The previous prime is 2775649. The next prime is 2775667. The reversal of 2775665 is 5665772.

2775665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2775665 - 2⁴ = 2775649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2775667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3119 + ... + 3908.

It is an arithmetic number, because the mean of its divisors is an integer number (421680).

2^2775665 is an apocalyptic number.

It is an amenable number.

2775665 is a deficient number, since it is larger than the sum of its proper divisors (597775).

2775665 is an equidigital number, since it uses as much as digits as its factorization.

2775665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7111.

The product of its digits is 88200, while the sum is 38.

The square root of 2775665 is about 1666.0327127641. The cubic root of 2775665 is about 140.5364621281.

The spelling of 2775665 in words is "two million, seven hundred seventy-five thousand, six hundred sixty-five".