266764247 has 2 divisors, whose sum is σ = 266764248. Its totient is φ = 266764246.

The previous prime is 266764229. The next prime is 266764261. The reversal of 266764247 is 742467662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266764247 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 266764198 and 266764207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266764447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133382123 + 133382124.

It is an arithmetic number, because the mean of its divisors is an integer number (133382124).

Almost surely, 2^266764247 is an apocalyptic number.

266764247 is a deficient number, since it is larger than the sum of its proper divisors (1).

266764247 is an equidigital number, since it uses as much as digits as its factorization.

266764247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 44.

The square root of 266764247 is about 16332.9191205981. The cubic root of 266764247 is about 643.7380908093.

The spelling of 266764247 in words is "two hundred sixty-six million, seven hundred sixty-four thousand, two hundred forty-seven".