2665944 has 48 divisors (see below), whose sum is σ = 7350720. Its totient is φ = 872640.

The previous prime is 2665939. The next prime is 2665967. The reversal of 2665944 is 4495662.

2665944 is a `hidden beast` number, since 2 + 66 + 594 + 4 = 666.

2665944 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2665944² = 14214514822272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2665899 and 2665908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4089 + ... + 4695.

It is an arithmetic number, because the mean of its divisors is an integer number (153140).

2^2665944 is an apocalyptic number.

2665944 is a gapful number since it is divisible by the number (24) 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 2665944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3675360).

2665944 is an abundant number, since it is smaller than the sum of its proper divisors (4684776).

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

2665944 is a wasteful number, since it uses less digits than its factorization.

2665944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 673 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2665944 is about 1632.7718762889. The cubic root of 2665944 is about 138.6597270114.

The spelling of 2665944 in words is "two million, six hundred sixty-five thousand, nine hundred forty-four".