2665984 has 40 divisors (see below), whose sum is σ = 5499648. Its totient is φ = 1290240.

The previous prime is 2665973. The next prime is 2666021. The reversal of 2665984 is 4895662.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20929 + ... + 21055.

2^2665984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2665984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2749824).

2665984 is an abundant number, since it is smaller than the sum of its proper divisors (2833664).

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

2665984 is an equidigital number, since it uses as much as digits as its factorization.

2665984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 170 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 2665984 is about 1632.7841253515. The cubic root of 2665984 is about 138.6604204945.

The spelling of 2665984 in words is "two million, six hundred sixty-five thousand, nine hundred eighty-four".