266428763 has 2 divisors, whose sum is σ = 266428764. Its totient is φ = 266428762.

The previous prime is 266428751. The next prime is 266428769. The reversal of 266428763 is 367824662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266428763 - 2¹⁰ = 266427739 is a prime.

It is not a weakly prime, because it can be changed into another prime (266428769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133214381 + 133214382.

It is an arithmetic number, because the mean of its divisors is an integer number (133214382).

Almost surely, 2^266428763 is an apocalyptic number.

266428763 is a deficient number, since it is larger than the sum of its proper divisors (1).

266428763 is an equidigital number, since it uses as much as digits as its factorization.

266428763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 44.

The square root of 266428763 is about 16322.6457107909. The cubic root of 266428763 is about 643.4681215665.

The spelling of 266428763 in words is "two hundred sixty-six million, four hundred twenty-eight thousand, seven hundred sixty-three".