2566215166 has 4 divisors (see below), whose sum is σ = 3849322752. Its totient is φ = 1283107582.

The previous prime is 2566215163. The next prime is 2566215193. The reversal of 2566215166 is 6615126652.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566215163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641553790 + ... + 641553793.

It is an arithmetic number, because the mean of its divisors is an integer number (962330688).

Almost surely, 2^2566215166 is an apocalyptic number.

2566215166 is a deficient number, since it is larger than the sum of its proper divisors (1283107586).

2566215166 is a wasteful number, since it uses less digits than its factorization.

2566215166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283107585.

The product of its digits is 129600, while the sum is 40.

The square root of 2566215166 is about 50657.8243314890. The cubic root of 2566215166 is about 1369.0869235119.

The spelling of 2566215166 in words is "two billion, five hundred sixty-six million, two hundred fifteen thousand, one hundred sixty-six".