266626904849 has 4 divisors (see below), whose sum is σ = 270382213440. Its totient is φ = 262871596260.

The previous prime is 266626904833. The next prime is 266626904861. The reversal of 266626904849 is 948409626662.

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 266626904849 - 2⁴ = 266626904833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266626904791 and 266626904800.

It is not an unprimeable number, because it can be changed into a prime (266626904879) 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, 1877654189 + ... + 1877654330.

It is an arithmetic number, because the mean of its divisors is an integer number (67595553360).

Almost surely, 2^266626904849 is an apocalyptic number.

It is an amenable number.

266626904849 is a deficient number, since it is larger than the sum of its proper divisors (3755308591).

266626904849 is an equidigital number, since it uses as much as digits as its factorization.

266626904849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755308590.

The product of its (nonzero) digits is 53747712, while the sum is 62.

The spelling of 266626904849 in words is "two hundred sixty-six billion, six hundred twenty-six million, nine hundred four thousand, eight hundred forty-nine".