266223647 has 2 divisors, whose sum is σ = 266223648. Its totient is φ = 266223646.

The previous prime is 266223613. The next prime is 266223667. The reversal of 266223647 is 746322662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266223647 - 2¹⁶ = 266158111 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266223647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266223667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133111823 + 133111824.

It is an arithmetic number, because the mean of its divisors is an integer number (133111824).

Almost surely, 2^266223647 is an apocalyptic number.

266223647 is a deficient number, since it is larger than the sum of its proper divisors (1).

266223647 is an equidigital number, since it uses as much as digits as its factorization.

266223647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 38.

The square root of 266223647 is about 16316.3613284335. The cubic root of 266223647 is about 643.3029498449.

The spelling of 266223647 in words is "two hundred sixty-six million, two hundred twenty-three thousand, six hundred forty-seven".