26644420266 has 16 divisors (see below), whose sum is σ = 53309203488. Its totient is φ = 8878079600.

The previous prime is 26644420217. The next prime is 26644420289. The reversal of 26644420266 is 66202444662.

It is a super-2 number, since 2×26644420266² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 831420 + ... + 862871.

It is an arithmetic number, because the mean of its divisors is an integer number (3331825218).

Almost surely, 2^26644420266 is an apocalyptic number.

26644420266 is an abundant number, since it is smaller than the sum of its proper divisors (26664783222).

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

26644420266 is a wasteful number, since it uses less digits than its factorization.

26644420266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696917.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 26644420266 in words is "twenty-six billion, six hundred forty-four million, four hundred twenty thousand, two hundred sixty-six".