2666262889 has 2 divisors, whose sum is σ = 2666262890. Its totient is φ = 2666262888.

The previous prime is 2666262829. The next prime is 2666262899. The reversal of 2666262889 is 9882626662.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2451933289 + 214329600 = 49517^2 + 14640^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666262889 - 2¹³ = 2666254697 is a prime.

It is not a weakly prime, because it can be changed into another prime (2666262829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333131444 + 1333131445.

It is an arithmetic number, because the mean of its divisors is an integer number (1333131445).

Almost surely, 2^2666262889 is an apocalyptic number.

It is an amenable number.

2666262889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666262889 is an equidigital number, since it uses as much as digits as its factorization.

2666262889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5971968, while the sum is 55.

The square root of 2666262889 is about 51635.8682409815. The cubic root of 2666262889 is about 1386.6525542190.

The spelling of 2666262889 in words is "two billion, six hundred sixty-six million, two hundred sixty-two thousand, eight hundred eighty-nine".