26221666636 has 24 divisors (see below), whose sum is σ = 50267281680. Its totient is φ = 11869478400.

The previous prime is 26221666633. The next prime is 26221666637. The reversal of 26221666636 is 63666612262.

It is not an unprimeable number, because it can be changed into a prime (26221666633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1225801 + ... + 1247008.

It is an arithmetic number, because the mean of its divisors is an integer number (2094470070).

Almost surely, 2^26221666636 is an apocalyptic number.

It is an amenable number.

26221666636 is a deficient number, since it is larger than the sum of its proper divisors (24045615044).

26221666636 is a wasteful number, since it uses less digits than its factorization.

26221666636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473065 (or 2473063 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 46.

The spelling of 26221666636 in words is "twenty-six billion, two hundred twenty-one million, six hundred sixty-six thousand, six hundred thirty-six".