26666666644 has 6 divisors (see below), whose sum is σ = 46666666634. Its totient is φ = 13333333320.

The previous prime is 26666666627. The next prime is 26666666651. The reversal of 26666666644 is 44666666662.

It can be written as a sum of positive squares in only one way, i.e., 22428656644 + 4238010000 = 149762^2 + 65100^2 .

It is a super-2 number, since 2×26666666644² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333333327 + ... + 3333333334.

Almost surely, 2^26666666644 is an apocalyptic number.

It is an amenable number.

26666666644 is a deficient number, since it is larger than the sum of its proper divisors (19999999990).

26666666644 is a wasteful number, since it uses less digits than its factorization.

26666666644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666666665 (or 6666666663 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 58.

The spelling of 26666666644 in words is "twenty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred forty-four".