2566420560 has 240 divisors, whose sum is σ = 9706664448. Its totient is φ = 602035200.

The previous prime is 2566420559. The next prime is 2566420567. The reversal of 2566420560 is 650246652.

2566420560 is a `hidden beast` number, since 2 + 5 + 6 + 642 + 0 + 5 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566420567) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 240294 + ... + 250746.

Almost surely, 2^2566420560 is an apocalyptic number.

2566420560 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 2566420560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4853332224).

2566420560 is an abundant number, since it is smaller than the sum of its proper divisors (7140243888).

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

2566420560 is a wasteful number, since it uses less digits than its factorization.

2566420560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10514 (or 10505 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 2566420560 is about 50659.8515591982. The cubic root of 2566420560 is about 1369.1234487341.

The spelling of 2566420560 in words is "two billion, five hundred sixty-six million, four hundred twenty thousand, five hundred sixty".