266644420266 has 32 divisors (see below), whose sum is σ = 645324312960. Its totient is φ = 71702701056.

The previous prime is 266644420213. The next prime is 266644420277. The reversal of 266644420266 is 662024446662.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186725071 + ... + 186726498.

It is an arithmetic number, because the mean of its divisors is an integer number (20166384780).

Almost surely, 2^266644420266 is an apocalyptic number.

266644420266 is an abundant number, since it is smaller than the sum of its proper divisors (378679892694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266644420266 is a wasteful number, since it uses less digits than its factorization.

266644420266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373451598.

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 266644420266 in words is "two hundred sixty-six billion, six hundred forty-four million, four hundred twenty thousand, two hundred sixty-six".