266412005 has 8 divisors (see below), whose sum is σ = 319852152. Its totient is φ = 213024448.

The previous prime is 266412001. The next prime is 266412007. The reversal of 266412005 is 500214662.

It can be written as a sum of positive squares in 4 ways, for example, as 174213601 + 92198404 = 13199^2 + 9602^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 266412005 - 2² = 266412001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266412001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974 + ... + 23103.

It is an arithmetic number, because the mean of its divisors is an integer number (39981519).

Almost surely, 2^266412005 is an apocalyptic number.

It is an amenable number.

266412005 is a deficient number, since it is larger than the sum of its proper divisors (53440147).

266412005 is a wasteful number, since it uses less digits than its factorization.

266412005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26295.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 266412005 is about 16322.1323668202. The cubic root of 266412005 is about 643.4546301992.

Adding to 266412005 its reverse (500214662), we get a palindrome (766626667).

The spelling of 266412005 in words is "two hundred sixty-six million, four hundred twelve thousand, five".