2566788631 has 4 divisors (see below), whose sum is σ = 2800133064. Its totient is φ = 2333444200.

The previous prime is 2566788619. The next prime is 2566788667. The reversal of 2566788631 is 1368876652.

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

It is a cyclic number.

It is not a de Polignac number, because 2566788631 - 2²⁵ = 2533234199 is a prime.

It is a super-2 number, since 2×2566788631² = 13176807752461708322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566788671) 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, 116672200 + ... + 116672221.

It is an arithmetic number, because the mean of its divisors is an integer number (700033266).

Almost surely, 2^2566788631 is an apocalyptic number.

2566788631 is a deficient number, since it is larger than the sum of its proper divisors (233344433).

2566788631 is a wasteful number, since it uses less digits than its factorization.

2566788631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233344432.

The product of its digits is 2903040, while the sum is 52.

The square root of 2566788631 is about 50663.4841972007. The cubic root of 2566788631 is about 1369.1888979381.

It can be divided in two parts, 2566 and 788631, that added together give a palindrome (791197).

The spelling of 2566788631 in words is "two billion, five hundred sixty-six million, seven hundred eighty-eight thousand, six hundred thirty-one".