26420744666 has 16 divisors (see below), whose sum is σ = 41184115200. Its totient is φ = 12698426640.

The previous prime is 26420744663. The next prime is 26420744717. The reversal of 26420744666 is 66644702462.

It is a self number, because there is not a number n which added to its sum of digits gives 26420744666.

It is not an unprimeable number, because it can be changed into a prime (26420744663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420766 + ... + 1439241.

It is an arithmetic number, because the mean of its divisors is an integer number (2574007200).

Almost surely, 2^26420744666 is an apocalyptic number.

26420744666 is a deficient number, since it is larger than the sum of its proper divisors (14763370534).

26420744666 is a wasteful number, since it uses less digits than its factorization.

26420744666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860189.

The product of its (nonzero) digits is 2322432, while the sum is 47.

The spelling of 26420744666 in words is "twenty-six billion, four hundred twenty million, seven hundred forty-four thousand, six hundred sixty-six".