2566870057 has 4 divisors (see below), whose sum is σ = 2608949956. Its totient is φ = 2524790160.

The previous prime is 2566870051. The next prime is 2566870063. The reversal of 2566870057 is 7500786652.

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 (2566870051) and next prime (2566870063).

It can be written as a sum of positive squares in 2 ways, for example, as 578691136 + 1988178921 = 24056^2 + 44589^2 .

It is a cyclic number.

It is not a de Polignac number, because 2566870057 - 2¹¹ = 2566868009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2566869989 and 2566870016.

It is not an unprimeable number, because it can be changed into a prime (2566870051) 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 3 ways as a sum of consecutive naturals, for example, 21039858 + ... + 21039979.

It is an arithmetic number, because the mean of its divisors is an integer number (652237489).

Almost surely, 2^2566870057 is an apocalyptic number.

It is an amenable number.

2566870057 is a deficient number, since it is larger than the sum of its proper divisors (42079899).

2566870057 is an equidigital number, since it uses as much as digits as its factorization.

2566870057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42079898.

The product of its (nonzero) digits is 705600, while the sum is 46.

The square root of 2566870057 is about 50664.2877873557. The cubic root of 2566870057 is about 1369.2033760029.

The spelling of 2566870057 in words is "two billion, five hundred sixty-six million, eight hundred seventy thousand, fifty-seven".