1226666279 has 2 divisors, whose sum is σ = 1226666280. Its totient is φ = 1226666278.

The previous prime is 1226666261. The next prime is 1226666281. The reversal of 1226666279 is 9726666221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1226666279 - 2¹⁶ = 1226600743 is a prime.

Together with 1226666281, 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 (1226666299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613333139 + 613333140.

It is an arithmetic number, because the mean of its divisors is an integer number (613333140).

Almost surely, 2^1226666279 is an apocalyptic number.

1226666279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226666279 is an equidigital number, since it uses as much as digits as its factorization.

1226666279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 47.

The square root of 1226666279 is about 35023.7958965044. The cubic root of 1226666279 is about 1070.4724029861.

The spelling of 1226666279 in words is "one billion, two hundred twenty-six million, six hundred sixty-six thousand, two hundred seventy-nine".