2566404172 has 6 divisors (see below), whose sum is σ = 4491207308. Its totient is φ = 1283202084.

The previous prime is 2566404163. The next prime is 2566404173. The reversal of 2566404172 is 2714046652.

It is not an unprimeable number, because it can be changed into a prime (2566404173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320800518 + ... + 320800525.

Almost surely, 2^2566404172 is an apocalyptic number.

It is an amenable number.

2566404172 is a deficient number, since it is larger than the sum of its proper divisors (1924803136).

2566404172 is a wasteful number, since it uses less digits than its factorization.

2566404172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641601047 (or 641601045 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 2566404172 is about 50659.6898134996. The cubic root of 2566404172 is about 1369.1205345271.

The spelling of 2566404172 in words is "two billion, five hundred sixty-six million, four hundred four thousand, one hundred seventy-two".