2566007555 has 4 divisors (see below), whose sum is σ = 3079209072. Its totient is φ = 2052806040.

The previous prime is 2566007539. The next prime is 2566007569. The reversal of 2566007555 is 5557006652.

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

It is not a de Polignac number, because 2566007555 - 2⁴ = 2566007539 is a prime.

It is a Duffinian 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, 256600751 + ... + 256600760.

It is an arithmetic number, because the mean of its divisors is an integer number (769802268).

Almost surely, 2^2566007555 is an apocalyptic number.

2566007555 is a deficient number, since it is larger than the sum of its proper divisors (513201517).

2566007555 is an equidigital number, since it uses as much as digits as its factorization.

2566007555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513201516.

The product of its (nonzero) digits is 315000, while the sum is 41.

The square root of 2566007555 is about 50655.7751396620. The cubic root of 2566007555 is about 1369.0500020599.

The spelling of 2566007555 in words is "two billion, five hundred sixty-six million, seven thousand, five hundred fifty-five".