2556066870 has 192 divisors, whose sum is σ = 8003174400. Its totient is φ = 565185600.

The previous prime is 2556066833. The next prime is 2556066911. The reversal of 2556066870 is 786606552.

2556066870 is a `hidden beast` number, since 2 + 5 + 560 + 6 + 6 + 87 + 0 = 666.

2556066870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 955635 + ... + 958305.

It is an arithmetic number, because the mean of its divisors is an integer number (41683200).

Almost surely, 2^2556066870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2556066870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4001587200).

2556066870 is an abundant number, since it is smaller than the sum of its proper divisors (5447107530).

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

2556066870 is a wasteful number, since it uses less digits than its factorization.

2556066870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736 (or 2719 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 2556066870 is about 50557.5599688118. The cubic root of 2556066870 is about 1367.2798193233.

The spelling of 2556066870 in words is "two billion, five hundred fifty-six million, sixty-six thousand, eight hundred seventy".