2560664 has 8 divisors (see below), whose sum is σ = 4801260. Its totient is φ = 1280328.

The previous prime is 2560661. The next prime is 2560669. The reversal of 2560664 is 4660652.

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160034 + ... + 160049.

2^2560664 is an apocalyptic number.

It is an amenable number.

2560664 is a deficient number, since it is larger than the sum of its proper divisors (2240596).

2560664 is a wasteful number, since it uses less digits than its factorization.

2560664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320089 (or 320085 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2560664 is about 1600.2074865467. The cubic root of 2560664 is about 136.8099020453.

The spelling of 2560664 in words is "two million, five hundred sixty thousand, six hundred sixty-four".