2665765 has 8 divisors (see below), whose sum is σ = 3207960. Its totient is φ = 2126592.

The previous prime is 2665763. The next prime is 2665771. The reversal of 2665765 is 5675662.

It can be written as a sum of positive squares in 4 ways, for example, as 51076 + 2614689 = 226^2 + 1617^2 .

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 2665765 - 2¹ = 2665763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665763) 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, 2377 + ... + 3313.

It is an arithmetic number, because the mean of its divisors is an integer number (400995).

2^2665765 is an apocalyptic number.

It is an amenable number.

2665765 is a deficient number, since it is larger than the sum of its proper divisors (542195).

2665765 is an equidigital number, since it uses as much as digits as its factorization.

2665765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511.

The product of its digits is 75600, while the sum is 37.

The square root of 2665765 is about 1632.7170606079. The cubic root of 2665765 is about 138.6566235895.

The spelling of 2665765 in words is "two million, six hundred sixty-five thousand, seven hundred sixty-five".