2558911966 has 16 divisors (see below), whose sum is σ = 4313350944. Its totient is φ = 1129686624.

The previous prime is 2558911937. The next prime is 2558911969. The reversal of 2558911966 is 6691198552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2558911969) 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 7 ways as a sum of consecutive naturals, for example, 2138961 + ... + 2140156.

It is an arithmetic number, because the mean of its divisors is an integer number (269584434).

Almost surely, 2^2558911966 is an apocalyptic number.

2558911966 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2558911966 is a deficient number, since it is larger than the sum of its proper divisors (1754438978).

2558911966 is a wasteful number, since it uses less digits than its factorization.

2558911966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4279155.

The product of its digits is 1166400, while the sum is 52.

The square root of 2558911966 is about 50585.6893399704. The cubic root of 2558911966 is about 1367.7869265484.

The spelling of 2558911966 in words is "two billion, five hundred fifty-eight million, nine hundred eleven thousand, nine hundred sixty-six".