266040650613 has 4 divisors (see below), whose sum is σ = 354720867488. Its totient is φ = 177360433740.

The previous prime is 266040650611. The next prime is 266040650677. The reversal of 266040650613 is 316056040662.

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 not a de Polignac number, because 266040650613 - 2¹ = 266040650611 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 (266040650611) 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, 44340108433 + ... + 44340108438.

It is an arithmetic number, because the mean of its divisors is an integer number (88680216872).

Almost surely, 2^266040650613 is an apocalyptic number.

It is an amenable number.

266040650613 is a deficient number, since it is larger than the sum of its proper divisors (88680216875).

266040650613 is an equidigital number, since it uses as much as digits as its factorization.

266040650613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88680216874.

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 266040650613 in words is "two hundred sixty-six billion, forty million, six hundred fifty thousand, six hundred thirteen".