266040799 has 2 divisors, whose sum is σ = 266040800. Its totient is φ = 266040798.

The previous prime is 266040787. The next prime is 266040823. The reversal of 266040799 is 997040662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266040799 - 2²⁷ = 131823071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266040779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133020399 + 133020400.

It is an arithmetic number, because the mean of its divisors is an integer number (133020400).

Almost surely, 2^266040799 is an apocalyptic number.

266040799 is a deficient number, since it is larger than the sum of its proper divisors (1).

266040799 is an equidigital number, since it uses as much as digits as its factorization.

266040799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 266040799 is about 16310.7571559385. The cubic root of 266040799 is about 643.1556381155.

The spelling of 266040799 in words is "two hundred sixty-six million, forty thousand, seven hundred ninety-nine".