26666426384 has 20 divisors (see below), whose sum is σ = 55640524716. Its totient is φ = 12307581312.

The previous prime is 26666426383. The next prime is 26666426401. The reversal of 26666426384 is 48362466662.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2230483984 + 24435942400 = 47228^2 + 156320^2 .

It is a super-2 number, since 2×26666426384² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26666426383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64101779 + ... + 64102194.

Almost surely, 2^26666426384 is an apocalyptic number.

It is an amenable number.

26666426384 is an abundant number, since it is smaller than the sum of its proper divisors (28974098332).

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

26666426384 is a wasteful number, since it uses less digits than its factorization.

26666426384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128203994 (or 128203988 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 53.

The spelling of 26666426384 in words is "twenty-six billion, six hundred sixty-six million, four hundred twenty-six thousand, three hundred eighty-four".