2516665 has 8 divisors (see below), whose sum is σ = 3051720. Its totient is φ = 1992192.

The previous prime is 2516659. The next prime is 2516669. The reversal of 2516665 is 5666152.

It can be written as a sum of positive squares in 4 ways, for example, as 477481 + 2039184 = 691^2 + 1428^2 .

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 2516665 - 2²¹ = 419513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2516669) 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, 2110 + ... + 3079.

It is an arithmetic number, because the mean of its divisors is an integer number (381465).

2^2516665 is an apocalyptic number.

It is an amenable number.

2516665 is a deficient number, since it is larger than the sum of its proper divisors (535055).

2516665 is an equidigital number, since it uses as much as digits as its factorization.

2516665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291.

The product of its digits is 10800, while the sum is 31.

The square root of 2516665 is about 1586.4000126072. The cubic root of 2516665 is about 136.0217850050.

The spelling of 2516665 in words is "two million, five hundred sixteen thousand, six hundred sixty-five".