2559660 has 48 divisors (see below), whose sum is σ = 7367136. Its totient is φ = 663552.

The previous prime is 2559631. The next prime is 2559677. The reversal of 2559660 is 669552.

2559660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 1644 + ... + 2796.

It is an arithmetic number, because the mean of its divisors is an integer number (153482).

2^2559660 is an apocalyptic number.

2559660 is a gapful number since it is divisible by the number (20) 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 2559660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3683568).

2559660 is an abundant number, since it is smaller than the sum of its proper divisors (4807476).

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

2559660 is a wasteful number, since it uses less digits than its factorization.

2559660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202 (or 1200 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 2559660 is about 1599.8937464719. The cubic root of 2559660 is about 136.7920193012.

It can be divided in two parts, 25 and 59660, that added together give a triangular number (59685 = T₃₄₅).

The spelling of 2559660 in words is "two million, five hundred fifty-nine thousand, six hundred sixty".