2566166526 has 48 divisors (see below), whose sum is σ = 6931986048. Its totient is φ = 666536400.

The previous prime is 2566166509. The next prime is 2566166549. The reversal of 2566166526 is 6256616652.

It is a happy number.

2566166526 is a `hidden beast` number, since 2 + 5 + 6 + 61 + 66 + 526 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 924360 + ... + 927131.

It is an arithmetic number, because the mean of its divisors is an integer number (144416376).

Almost surely, 2^2566166526 is an apocalyptic number.

2566166526 is an abundant number, since it is smaller than the sum of its proper divisors (4365819522).

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

2566166526 is a wasteful number, since it uses less digits than its factorization.

2566166526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851517 (or 1851514 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 2566166526 is about 50657.3442454300. The cubic root of 2566166526 is about 1369.0782735736.

The spelling of 2566166526 in words is "two billion, five hundred sixty-six million, one hundred sixty-six thousand, five hundred twenty-six".