2666439029 has 2 divisors, whose sum is σ = 2666439030. Its totient is φ = 2666439028.

The previous prime is 2666439023. The next prime is 2666439031. The reversal of 2666439029 is 9209346662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2570692804 + 95746225 = 50702^2 + 9785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2666439029 is a prime.

Together with 2666439031, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666439023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333219514 + 1333219515.

It is an arithmetic number, because the mean of its divisors is an integer number (1333219515).

Almost surely, 2^2666439029 is an apocalyptic number.

It is an amenable number.

2666439029 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666439029 is an equidigital number, since it uses as much as digits as its factorization.

2666439029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 47.

The square root of 2666439029 is about 51637.5738101627. The cubic root of 2666439029 is about 1386.6830887928.

The spelling of 2666439029 in words is "two billion, six hundred sixty-six million, four hundred thirty-nine thousand, twenty-nine".