2665860 has 48 divisors (see below), whose sum is σ = 7538496. Its totient is φ = 703872.

The previous prime is 2665849. The next prime is 2665867. The reversal of 2665860 is 685662.

It is not an unprimeable number, because it can be changed into a prime (2665867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9279 + ... + 9561.

It is an arithmetic number, because the mean of its divisors is an integer number (157052).

2^2665860 is an apocalyptic number.

2665860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2665860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3769248).

2665860 is an abundant number, since it is smaller than the sum of its proper divisors (4872636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2665860 is a wasteful number, since it uses less digits than its factorization.

2665860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 2665860 is about 1632.7461529583. The cubic root of 2665860 is about 138.6582706743.

The spelling of 2665860 in words is "two million, six hundred sixty-five thousand, eight hundred sixty".