2566644164 has 24 divisors (see below), whose sum is σ = 5165993280. Its totient is φ = 1092982176.

The previous prime is 2566644149. The next prime is 2566644167. The reversal of 2566644164 is 4614466652.

It is not an unprimeable number, because it can be changed into a prime (2566644167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287534 + ... + 296325.

It is an arithmetic number, because the mean of its divisors is an integer number (215249720).

Almost surely, 2^2566644164 is an apocalyptic number.

It is an amenable number.

2566644164 is an abundant number, since it is smaller than the sum of its proper divisors (2599349116).

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

2566644164 is a wasteful number, since it uses less digits than its factorization.

2566644164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584027 (or 584025 counting only the distinct ones).

The product of its digits is 829440, while the sum is 44.

The square root of 2566644164 is about 50662.0584264003. The cubic root of 2566644164 is about 1369.1632100258.

The spelling of 2566644164 in words is "two billion, five hundred sixty-six million, six hundred forty-four thousand, one hundred sixty-four".