266740069 has 4 divisors (see below), whose sum is σ = 280779040. Its totient is φ = 252701100.

The previous prime is 266740063. The next prime is 266740073. The reversal of 266740069 is 960047662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 266740069 - 2¹⁷ = 266608997 is a prime.

It is a super-2 number, since 2×266740069² = 142300528820249522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266740063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7019457 + ... + 7019494.

It is an arithmetic number, because the mean of its divisors is an integer number (70194760).

Almost surely, 2^266740069 is an apocalyptic number.

It is an amenable number.

266740069 is a deficient number, since it is larger than the sum of its proper divisors (14038971).

266740069 is a wasteful number, since it uses less digits than its factorization.

266740069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14038970.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 266740069 is about 16332.1789421987. The cubic root of 266740069 is about 643.7186419639.

The spelling of 266740069 in words is "two hundred sixty-six million, seven hundred forty thousand, sixty-nine".