22066412501 has 6 divisors (see below), whose sum is σ = 25669092150. Its totient is φ = 18914067816.

The previous prime is 22066412477. The next prime is 22066412513. The reversal of 22066412501 is 10521466022.

It can be written as a sum of positive squares in only one way, i.e., 12144260401 + 9922152100 = 110201^2 + 99610^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22066412501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22066412201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 225167426 + ... + 225167523.

It is an arithmetic number, because the mean of its divisors is an integer number (4278182025).

Almost surely, 2^22066412501 is an apocalyptic number.

It is an amenable number.

22066412501 is a deficient number, since it is larger than the sum of its proper divisors (3602679649).

22066412501 is an equidigital number, since it uses as much as digits as its factorization.

22066412501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450334963 (or 450334956 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 22066412501 its reverse (10521466022), we get a palindrome (32587878523).

The spelling of 22066412501 in words is "twenty-two billion, sixty-six million, four hundred twelve thousand, five hundred one".