2665624 has 48 divisors (see below), whose sum is σ = 5760720. Its totient is φ = 1149120.

The previous prime is 2665601. The next prime is 2665627. The reversal of 2665624 is 4265662.

Its product of digits (17280) is a multiple of the sum of its prime factors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37509 + ... + 37579.

It is an arithmetic number, because the mean of its divisors is an integer number (120015).

2^2665624 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 2665624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2880360).

2665624 is an abundant number, since it is smaller than the sum of its proper divisors (3095096).

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

2665624 is a wasteful number, since it uses less digits than its factorization.

2665624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 105 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 2665624 is about 1632.6738804795. The cubic root of 2665624 is about 138.6541788968.

The spelling of 2665624 in words is "two million, six hundred sixty-five thousand, six hundred twenty-four".