2768665 has 4 divisors (see below), whose sum is σ = 3322404. Its totient is φ = 2214928.

The previous prime is 2768663. The next prime is 2768677. The reversal of 2768665 is 5668672.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 797449 + 1971216 = 893^2 + 1404^2 .

It is a cyclic number.

It is not a de Polignac number, because 2768665 - 2¹ = 2768663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2768663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276862 + ... + 276871.

It is an arithmetic number, because the mean of its divisors is an integer number (830601).

2^2768665 is an apocalyptic number.

It is an amenable number.

2768665 is a deficient number, since it is larger than the sum of its proper divisors (553739).

2768665 is an equidigital number, since it uses as much as digits as its factorization.

2768665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553738.

The product of its digits is 120960, while the sum is 40.

The square root of 2768665 is about 1663.9305874946. The cubic root of 2768665 is about 140.4182221893.

The spelling of 2768665 in words is "two million, seven hundred sixty-eight thousand, six hundred sixty-five".