266097813 has 4 divisors (see below), whose sum is σ = 354797088. Its totient is φ = 177398540.

The previous prime is 266097781. The next prime is 266097857. The reversal of 266097813 is 318790662.

It is a happy number.

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 266097813 - 2⁵ = 266097781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266097863) 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, 44349633 + ... + 44349638.

It is an arithmetic number, because the mean of its divisors is an integer number (88699272).

Almost surely, 2^266097813 is an apocalyptic number.

It is an amenable number.

266097813 is a deficient number, since it is larger than the sum of its proper divisors (88699275).

266097813 is an equidigital number, since it uses as much as digits as its factorization.

266097813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88699274.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 266097813 is about 16312.5048045970. The cubic root of 266097813 is about 643.2015787589.

The spelling of 266097813 in words is "two hundred sixty-six million, ninety-seven thousand, eight hundred thirteen".