2580566681 has 16 divisors (see below), whose sum is σ = 3386664960. Its totient is φ = 1904996880.

The previous prime is 2580566671. The next prime is 2580566683. The reversal of 2580566681 is 1866650852.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2580566681 - 2³⁰ = 1506824857 is a prime.

It is a super-2 number, since 2×2580566681² = 13318648790174711522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2580566683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880481 + ... + 883406.

It is an arithmetic number, because the mean of its divisors is an integer number (211666560).

Almost surely, 2^2580566681 is an apocalyptic number.

It is an amenable number.

2580566681 is a deficient number, since it is larger than the sum of its proper divisors (806098279).

2580566681 is a wasteful number, since it uses less digits than its factorization.

2580566681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763924.

The product of its (nonzero) digits is 691200, while the sum is 47.

The square root of 2580566681 is about 50799.2783511735. The cubic root of 2580566681 is about 1371.6343790334.

The spelling of 2580566681 in words is "two billion, five hundred eighty million, five hundred sixty-six thousand, six hundred eighty-one".