2566672065 has 12 divisors (see below), whose sum is σ = 4448898324. Its totient is φ = 1368891744.

The previous prime is 2566672061. The next prime is 2566672079. The reversal of 2566672065 is 5602766652.

2566672065 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 2 ways, for example, as 1375593921 + 1191078144 = 37089^2 + 34512^2 .

It is not a de Polignac number, because 2566672065 - 2² = 2566672061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 57037157 = 2566672065 / (2 + 5 + 6 + 6 + 6 + 7 + 2 + 0 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 2566672065.

It is not an unprimeable number, because it can be changed into a prime (2566672061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28518534 + ... + 28518623.

It is an arithmetic number, because the mean of its divisors is an integer number (370741527).

Almost surely, 2^2566672065 is an apocalyptic number.

It is an amenable number.

2566672065 is a deficient number, since it is larger than the sum of its proper divisors (1882226259).

2566672065 is a wasteful number, since it uses less digits than its factorization.

2566672065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57037168 (or 57037165 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The square root of 2566672065 is about 50662.3337895127. Note that the first 3 decimals coincide. The cubic root of 2566672065 is about 1369.1681712231.

The spelling of 2566672065 in words is "two billion, five hundred sixty-six million, six hundred seventy-two thousand, sixty-five".