266040823 has 2 divisors, whose sum is σ = 266040824. Its totient is φ = 266040822.

The previous prime is 266040799. The next prime is 266040877. The reversal of 266040823 is 328040662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266040823 - 2²¹ = 263943671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266040883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133020411 + 133020412.

It is an arithmetic number, because the mean of its divisors is an integer number (133020412).

Almost surely, 2^266040823 is an apocalyptic number.

266040823 is a deficient number, since it is larger than the sum of its proper divisors (1).

266040823 is an equidigital number, since it uses as much as digits as its factorization.

266040823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 266040823 is about 16310.7578916493. The cubic root of 266040823 is about 643.1556574555.

The spelling of 266040823 in words is "two hundred sixty-six million, forty thousand, eight hundred twenty-three".