26066422221 has 32 divisors (see below), whose sum is σ = 42383600640. Its totient is φ = 13917826944.

The previous prime is 26066422153. The next prime is 26066422223. The reversal of 26066422221 is 12222466062.

It is not a de Polignac number, because 26066422221 - 2⁷ = 26066422093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26066422223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 418335 + ... + 476588.

It is an arithmetic number, because the mean of its divisors is an integer number (1324487520).

Almost surely, 2^26066422221 is an apocalyptic number.

26066422221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26066422221 is a deficient number, since it is larger than the sum of its proper divisors (16317178419).

26066422221 is a wasteful number, since it uses less digits than its factorization.

26066422221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895025.

The product of its (nonzero) digits is 27648, while the sum is 33.

Adding to 26066422221 its reverse (12222466062), we get a palindrome (38288888283).

The spelling of 26066422221 in words is "twenty-six billion, sixty-six million, four hundred twenty-two thousand, two hundred twenty-one".