2665345 has 8 divisors (see below), whose sum is σ = 3386664. Its totient is φ = 2006784.

The previous prime is 2665343. The next prime is 2665357. The reversal of 2665345 is 5435662.

It can be written as a sum of positive squares in 4 ways, for example, as 848241 + 1817104 = 921^2 + 1348^2 .

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 2665345 - 2¹ = 2665343 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6 + 6⁶ + 5⁷ + 3¹⁰ + 4⁶ + 5⁹ .

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2665343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15594 + ... + 15763.

It is an arithmetic number, because the mean of its divisors is an integer number (423333).

2^2665345 is an apocalyptic number.

It is an amenable number.

2665345 is a deficient number, since it is larger than the sum of its proper divisors (721319).

2665345 is a wasteful number, since it uses less digits than its factorization.

2665345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31379.

The product of its digits is 21600, while the sum is 31.

The square root of 2665345 is about 1632.5884355832. The cubic root of 2665345 is about 138.6493412721.

The spelling of 2665345 in words is "two million, six hundred sixty-five thousand, three hundred forty-five".