2566123066 has 8 divisors (see below), whose sum is σ = 4145275764. Its totient is φ = 1184364480.

The previous prime is 2566123039. The next prime is 2566123097. The reversal of 2566123066 is 6603216652.

It can be written as a sum of positive squares in 2 ways, for example, as 2379390841 + 186732225 = 48779^2 + 13665^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49348495 + ... + 49348546.

Almost surely, 2^2566123066 is an apocalyptic number.

2566123066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2566123066 is a deficient number, since it is larger than the sum of its proper divisors (1579152698).

2566123066 is a wasteful number, since it uses less digits than its factorization.

2566123066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98697056.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 2566123066 is about 50656.9152831082. The cubic root of 2566123066 is about 1369.0705447328.

The spelling of 2566123066 in words is "two billion, five hundred sixty-six million, one hundred twenty-three thousand, sixty-six".