2866166561 has 8 divisors (see below), whose sum is σ = 3045569544. Its totient is φ = 2687964160.

The previous prime is 2866166509. The next prime is 2866166579. The reversal of 2866166561 is 1656616682.

2866166561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 197824225 + 2668342336 = 14065^2 + 51656^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2866166561 - 2¹⁸ = 2865904417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2866166581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295220 + ... + 304773.

It is an arithmetic number, because the mean of its divisors is an integer number (380696193).

Almost surely, 2^2866166561 is an apocalyptic number.

It is an amenable number.

2866166561 is a deficient number, since it is larger than the sum of its proper divisors (179402983).

2866166561 is a wasteful number, since it uses less digits than its factorization.

2866166561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600291.

The product of its digits is 622080, while the sum is 47.

The square root of 2866166561 is about 53536.5908608309. The cubic root of 2866166561 is about 1420.4756987535.

The spelling of 2866166561 in words is "two billion, eight hundred sixty-six million, one hundred sixty-six thousand, five hundred sixty-one".