2566764555 has 16 divisors (see below), whose sum is σ = 4217819424. Its totient is φ = 1331942400.

The previous prime is 2566764547. The next prime is 2566764619. The reversal of 2566764555 is 5554676652.

It is not a de Polignac number, because 2566764555 - 2³ = 2566764547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2566764498 and 2566764507.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2311846 + ... + 2312955.

It is an arithmetic number, because the mean of its divisors is an integer number (263613714).

Almost surely, 2^2566764555 is an apocalyptic number.

2566764555 is a deficient number, since it is larger than the sum of its proper divisors (1651054869).

2566764555 is a wasteful number, since it uses less digits than its factorization.

2566764555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4624846.

The product of its digits is 7560000, while the sum is 51.

The square root of 2566764555 is about 50663.2465896137. The cubic root of 2566764555 is about 1369.1846170123.

The spelling of 2566764555 in words is "two billion, five hundred sixty-six million, seven hundred sixty-four thousand, five hundred fifty-five".