266722879 has 2 divisors, whose sum is σ = 266722880. Its totient is φ = 266722878.

The previous prime is 266722861. The next prime is 266722919. The reversal of 266722879 is 978227662.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266722879 is a prime.

It is a super-2 number, since 2×266722879² = 142282188364097282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266722829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133361439 + 133361440.

It is an arithmetic number, because the mean of its divisors is an integer number (133361440).

Almost surely, 2^266722879 is an apocalyptic number.

266722879 is a deficient number, since it is larger than the sum of its proper divisors (1).

266722879 is an equidigital number, since it uses as much as digits as its factorization.

266722879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 49.

The square root of 266722879 is about 16331.6526720354. The cubic root of 266722879 is about 643.7048135688.

The spelling of 266722879 in words is "two hundred sixty-six million, seven hundred twenty-two thousand, eight hundred seventy-nine".