266980379 has 2 divisors, whose sum is σ = 266980380. Its totient is φ = 266980378.

The previous prime is 266980367. The next prime is 266980411. The reversal of 266980379 is 973089662.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266980379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (266980319) 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 as a sum of consecutive naturals, namely, 133490189 + 133490190.

It is an arithmetic number, because the mean of its divisors is an integer number (133490190).

Almost surely, 2^266980379 is an apocalyptic number.

266980379 is a deficient number, since it is larger than the sum of its proper divisors (1).

266980379 is an equidigital number, since it uses as much as digits as its factorization.

266980379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 266980379 is about 16339.5342344878. The cubic root of 266980379 is about 643.9118957633.

The spelling of 266980379 in words is "two hundred sixty-six million, nine hundred eighty thousand, three hundred seventy-nine".