2684665 has 4 divisors (see below), whose sum is σ = 3221604. Its totient is φ = 2147728.

The previous prime is 2684663. The next prime is 2684701. The reversal of 2684665 is 5664862.

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 1375929 + 1308736 = 1173^2 + 1144^2 .

It is a cyclic number.

It is not a de Polignac number, because 2684665 - 2¹ = 2684663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2684663) 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, 268462 + ... + 268471.

It is an arithmetic number, because the mean of its divisors is an integer number (805401).

2^2684665 is an apocalyptic number.

It is an amenable number.

2684665 is a deficient number, since it is larger than the sum of its proper divisors (536939).

2684665 is an equidigital number, since it uses as much as digits as its factorization.

2684665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536938.

The product of its digits is 69120, while the sum is 37.

The square root of 2684665 is about 1638.4947360306. The cubic root of 2684665 is about 138.9835392753.

The spelling of 2684665 in words is "two million, six hundred eighty-four thousand, six hundred sixty-five".