2655664 has 40 divisors (see below), whose sum is σ = 5713920. Its totient is φ = 1185600.

The previous prime is 2655661. The next prime is 2655691. The reversal of 2655664 is 4665562.

It is not an unprimeable number, because it can be changed into a prime (2655661) 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, 13809 + ... + 13999.

It is an arithmetic number, because the mean of its divisors is an integer number (142848).

2^2655664 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 2655664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2856960).

2655664 is an abundant number, since it is smaller than the sum of its proper divisors (3058256).

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

2655664 is a wasteful number, since it uses less digits than its factorization.

2655664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 283 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 2655664 is about 1629.6208147910. The cubic root of 2655664 is about 138.4812713883.

It can be divided in two parts, 265 and 5664, that added together give a square (5929 = 77²).

The spelling of 2655664 in words is "two million, six hundred fifty-five thousand, six hundred sixty-four".