2566986245 has 4 divisors (see below), whose sum is σ = 3080383500. Its totient is φ = 2053588992.

The previous prime is 2566986197. The next prime is 2566986293. The reversal of 2566986245 is 5426896652.

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

It is an interprime number because it is at equal distance from previous prime (2566986197) and next prime (2566986293).

It can be written as a sum of positive squares in 2 ways, for example, as 2031665476 + 535320769 = 45074^2 + 23137^2 .

It is a cyclic number.

It is not a de Polignac number, because 2566986245 - 2¹⁰ = 2566985221 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256698620 + ... + 256698629.

It is an arithmetic number, because the mean of its divisors is an integer number (770095875).

Almost surely, 2^2566986245 is an apocalyptic number.

It is an amenable number.

2566986245 is a deficient number, since it is larger than the sum of its proper divisors (513397255).

2566986245 is an equidigital number, since it uses as much as digits as its factorization.

2566986245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513397254.

The product of its digits is 6220800, while the sum is 53.

The square root of 2566986245 is about 50665.4344203225. The cubic root of 2566986245 is about 1369.2240344440.

The spelling of 2566986245 in words is "two billion, five hundred sixty-six million, nine hundred eighty-six thousand, two hundred forty-five".