18466622666481 has 16 divisors (see below), whose sum is σ = 26864451652608. Its totient is φ = 11190263528400.

The previous prime is 18466622666477. The next prime is 18466622666507.

It is a happy number.

18466622666481 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18466622666481 - 2² = 18466622666477 is a prime.

It is a super-2 number, since 2×18466622666481² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18466622666981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40494741 + ... + 40948226.

It is an arithmetic number, because the mean of its divisors is an integer number (1679028228288).

Almost surely, 2^{18466622666481} is an apocalyptic number.

18466622666481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18466622666481 is a deficient number, since it is larger than the sum of its proper divisors (8397828986127).

18466622666481 is a wasteful number, since it uses less digits than its factorization.

18466622666481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81449852.

The product of its digits is 191102976, while the sum is 66.

The spelling of 18466622666481 in words is "eighteen trillion, four hundred sixty-six billion, six hundred twenty-two million, six hundred sixty-six thousand, four hundred eighty-one".