2559466566 has 64 divisors (see below), whose sum is σ = 5810227200. Its totient is φ = 834863328.

The previous prime is 2559466537. The next prime is 2559466571. The reversal of 2559466566 is 6656649552.

It is a happy number.

2559466566 is a `hidden beast` number, since 25 + 59 + 4 + 6 + 6 + 566 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1369965 + ... + 1371831.

It is an arithmetic number, because the mean of its divisors is an integer number (90784800).

Almost surely, 2^2559466566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2559466566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2905113600).

2559466566 is an abundant number, since it is smaller than the sum of its proper divisors (3250760634).

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

2559466566 is a wasteful number, since it uses less digits than its factorization.

2559466566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410 (or 2404 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 54.

The square root of 2559466566 is about 50591.1708304918. The cubic root of 2559466566 is about 1367.8857341463.

The spelling of 2559466566 in words is "two billion, five hundred fifty-nine million, four hundred sixty-six thousand, five hundred sixty-six".